Term
| an object in mechanical equilibrium is an object... |
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Definition
| at rest, moving with constant velocity, and having no acceleration |
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Term
| when you stand at rest on a pair of bathroom scales, the readings on the scales will always.. |
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Definition
| add up to equal your weight |
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Term
| a man weighing 800 N stands at rest on two bathroom scaled so that his weight is distributed evenly over both scales. the reading on each scale is... |
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Definition
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Term
| the force of friction on a sliding object is 10 n. the applied force needed to maintain a constant velocity is.. |
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Definition
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Term
| a package falls off a truck that is moving at 30m/s. neglecting the air resistance, the horizontal speed of the package just before it hits the ground is... |
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Definition
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Term
| if your automobile runs out of fuel while you are driving, the engine stops but you do not come to an abrupt stop. the concept that most explains why is... |
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Definition
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Term
| according to newtons law of inertia, a railroad train in motion should continue going forever, even if its engine is turned off. we never observe this, because railroad trains... |
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Definition
| always has forces hat oppose their motion |
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Term
| whirl a rock at the end of a string and it follows a circular path. if the string breaks the tendency of the rock is to... |
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Definition
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Term
| if no external forces are acting, on a moving object, it will.. |
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Definition
| continue moving at the same velocity |
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Term
| two measurements necessary for calculating average speed are... |
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Definition
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Term
| a car maintains a constant velocity of 100 km/hr during this interval, its acceleration is... |
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Definition
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Term
| while an object near the earths surface is in freefall its... |
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Definition
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Term
| an object at rest near the surface of a distant planet starts the fall freely if the acceleration there is twice that of the earths, its speed one second later, would be... |
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Definition
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Term
| if an object falling freely from somehow equipped with an odometer to measure the distance it travels then tha amount of distance it travels each succeeding second it travels would be... |
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Definition
| grater than the second before |
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Term
| if a freely falling object were somehow equipped with a speedometer its speed reading would increase each second by.. |
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Definition
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Term
| if a car increases it velocity form zero to 60 km/h in 10 secs its acceleration is... |
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Definition
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Term
| if a rocket initially at rest accelerates at a rate of 50m/s2 for a minute, its speed will be what? |
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Definition
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Term
| it takes 6 seconds for a stone to fall to the bottom of a mine shaft, how deep is the shaft? |
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Definition
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Term
| in each second of fall, the distance a freely falling object will fall is.. |
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Definition
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Term
| a ball tossed vertically upward rises reaches its highest point and then falls back to its starting point, during this time the acceleration of the ball is always... |
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Definition
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Term
| while a car travels around a circular track at a constant speed, its... |
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Definition
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Term
| a ball is thrown upwards and returns to the same position. compared with its original speed after release its speed when it returns, is about.. |
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Definition
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Term
| at one instant an object in free fall is moving downward at 50 m/s, 1 second later, its speed should be about.. |
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Definition
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Term
| at one instant a heavy object in the air is moving upward, at 50 m/s. 1 second later, its speed is approximetaley ... |
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Definition
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Term
| disregarding air resistance, objects fall with constant... |
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Definition
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Term
| a ball is thrown upwards and caught when it comes back down. in the presences of air resistance the speed with which it is caught, is always... |
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Definition
| less than the speed it had when thrown upwards. |
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Term
| if you drop an object, it will accelerate downward at the rate of 9.8m/s. if you instead throw it downwards, its acceleration (in the absence of air resistance) will be.. |
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Definition
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Term
| if a projectile is fired straight up at the speed of 10 m/s, the time it takes to reach the top of its path is.. |
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Definition
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Term
| if a projectile is fired straight up at the speed of 10 m/s the time to rturn to its starting position is about, |
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Definition
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Term
| consider drops of water that lead to a stead rate, form a dipping faucet. as the drops fall, they |
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Definition
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Term
| a car accelerates from rest for 5 seconds, until it reaches a speed of 20 m/s. what is the cars acceleration in m/s/s? |
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Definition
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Term
| when a rock thrown straight upwards gets to the exact top of its path, its.. |
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Definition
| velocity is zero, and acceleration is about 10m/s/s |
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Term
| a kilogram is a measurment of a objects.. |
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Definition
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Term
| compared to a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much |
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Definition
| inertia, mass, and volume |
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Term
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Definition
| the gravitational attraction force between you and the earth. |
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Term
| if one object has twice as much mass as another object it also as twice as much... |
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Definition
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Term
| compared to the mass of a certain object on earth, the mass of the same object on the moon is.. |
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Definition
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Term
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Definition
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Term
| a force is a vector quantity because it has both... |
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Definition
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Term
| an object is propelled along a straight line path by a force if the net force were doubled, the objects acceleration would be... |
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Definition
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Term
| an object is pulled northward by a force of 10 N and at the same time, another force of 15 N pulls it southward, the magnitude of the resultant force on the object is... |
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Definition
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Term
| the force of friction on a sliding object is 10 N the applied force to maintain constant velocity is.. |
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Definition
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Term
| which has zero acceleration? an object.... |
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Definition
| at rest, moving at constant velocity, in mechanical equillibrium. |
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Term
| a 1-kg mass at the end of earths surface weighs... |
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Definition
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Term
| hang a pair of gym rings, and the upward support forces of he rings, will always |
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Definition
| add up to equal your weight. |
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Term
| a car has a mass of 1000- kilograms, and accelerates at 2m/s/s. what is the magnitude of the net force exherted on the car? |
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Definition
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Term
| a tow truck exerts a force of 3000N on a car. accelerating it at 2m/s/s. what is the mass of the car? |
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Definition
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Term
| if the mass of an object does not change, a constant net force on the object produces constant... |
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Definition
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Term
| an object following a straight line path at constant speed.... |
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Definition
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Term
| neglecting friction a large block of ice and a small block of ice start sliding down an incline together.. the heavier block will get to the bottom.... |
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Definition
| at the same time as the light block |
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Term
| na rocket becomes progressively easier to accelerate as it travels upward from the ground, mainly because... |
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Definition
| the mass of the rocket decreases as fuel is burned. |
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Term
| a rocket is thrown vertically into the air. at the very top of it trajectory the net force on it is... |
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Definition
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Term
| a block is dragged without acceleration in a straight line path across a level surface by a force of 6 N. what is the force of friction between the block and the surface? |
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Definition
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Term
| suppose a particle i being accelerated threw space by a 10 N force. suddenly, the particle encounters a second force of 10 N in the opposite direction from the first force. the particle with both forces acting on it... |
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Definition
| continues at the speed it had when it encountered the second force |
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Term
| a skydiver of mass 100-kg experiences air resistance of 500N, and an acceleration of.. |
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Definition
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Term
| a car traveling at 22m/s comes to an abrupt hualt in 0.1 second when it hits a tree. what is the decelleration in m/s/s of the car? |
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Definition
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Term
| if less horizontal force is applied to a sliding object then is needed to maintain a constant velocity... |
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Definition
| the object eventually slides to a stop. |
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Term
| two factors that greatly affect air resistance on falling objects are the... |
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Definition
| size and speed of the object. |
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Term
| when a falling object has reached its terminal velocity, its accelertion is... |
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Definition
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Term
| a skydiver jumps form a high flying plane. as her velocity of fall increases, her acceleration.. |
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Definition
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Term
| a skydiver terminal velocity will be greatest if he falls... |
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Definition
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Term
| for an action force, there but be a reaction force that... |
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Definition
| is exactly equal in magnitude. |
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Term
| an archer shoots an arrow. consider the action force to be the bow string against the arrow. the reaction to the force is... |
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Definition
| arrows push against the bow string. |
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Term
| a person is attracted to the center of the earth by 500-N gravitational force. the earth is attracted toward the person with a froce of... |
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Definition
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Term
| a mack truck and a volkswagen traveling at the same speed have a head on collision. the vehicle that undergoes the greatest change in velocity will be the... |
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Definition
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Term
| two people, one twice as massive as the other, attempt a tug of war, with 12 meters of mass-less rope on a friction-less ice. after a brief time they meet. the heavier person slides the distance of... |
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Definition
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Term
| which of the following has the largest momentum? relative to the earhts surface.. |
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Definition
| a pick up truck speeding along a highway. |
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Term
| a freight train rolls along a track, with considerable momentum. if it rolls at the same speed, but has twice as much mass, its momentum is... |
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Definition
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Term
| a rifle recoils while firing a bullet, the peed of the rifles recoil is... |
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Definition
| small because the rifle has much more mass than the bullet. |
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Term
| to catch a ball, a baseball player extends the hand froward before impact with the ball an then lets it ride backward in the direction of the balls motion, doing this reduces the force of impact of the players hand principaly because the... |
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Definition
| time of impact is increased. |
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Term
| when you jump form an elevated position you usually bend your knees upon reaching the ground. by dowing this, you make the time of impact about ten times as great as for a stiff legged landing, in this way the average force, your body experinces is.. |
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Definition
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Term
| a heavy truck and a small car rolling down a hill at the same speed are forced to stop in the same amount of time. compared to the force that stops the car, the force is needed to stop the truck is.. |
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Definition
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Term
| a karate expert breaks a cement block with her bear hand. the magnitude of the force exerted by her hand is... |
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Definition
| identical to the force applied to the block. |
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Term
| the force that accelerates a rocket into outer space, is exerted on the rocket by the.. |
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Definition
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Term
| two billiard balls having the same mass and speed, roll towards eachother, what is their combined momentum after they meet? |
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Definition
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Term
| a large metal ball is shot form a cannon, with a short barrel, if the small ball were to be shot from the canon with a longer barrell, its muzzel velocity would be |
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Definition
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Term
| your driving down the highway and a bug splatters onto your windsheild. which undergoes the greater change in momentum druing the time of contact? |
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Definition
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Term
| an astronaut, floating along in outer space throws a bseball, if the ball floats aay at the speed of 20 m/s. the atronuat will... |
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Definition
| move in the opposite direction butin a lower speed.. |
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Term
| the change in momentum in kg m/s that occurs when a 1.0 kg ball traveling at 4 m/s strikes a wall and bounces back at 2.0 m/s is. |
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Definition
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Term
| if you push a half an hour or a whole hour against a sationary wall.... |
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Definition
| no work on the wall is done in either case. |
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Term
| if you find that twice as much work is needed to perform a task but it takes twice as much time..the amount of power required is.. |
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Definition
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Term
| if you do work on an obect in 1/3rd the usual time, our power output is.. |
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Definition
| 3 times the usual power output. |
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Term
| if the object is raised twice as high, its potential energy will be.. |
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Definition
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Term
| a one thousand kilogram car and a 2000 kg car are hoisted the same distance. raising the more massive car requires... |
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Definition
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Term
| an obect that has kinetic energy, must be... |
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Definition
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Term
| an object may have potential energy because of its... |
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Definition
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Term
| a bow is drawn so that it has 40 J of potential energy. when fired, the arrow will idealy have a kinetic energy that is... |
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Definition
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Term
| when an automobile is breaked to a stop, its kinetic energy is transformed to... |
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Definition
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Term
| a ball rolling down a incline has its maximum potential energy at... |
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Definition
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Term
| a ball roling down an incline has it maximum kinetic energy at, |
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Definition
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Term
| what task requries the most work? lifting a 50 kg sack, 2 meters, or lifting a 25 kg sack, 4 meters |
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Definition
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Term
| both a 50 kg sack if lifting 2 meters from the ground and 2 kg sack is lifted 4 meters in the same time.. the power expanded in raising the 50 kg sack is... |
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Definition
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Term
| a tv set is pushed a distance of 2 meters, with a force of 20 N. how much work is done on the set? |
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Definition
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Term
| it tkes 40 j to push a large box, 4 meters across a floor, assuming the push is in the same direction as the move, what is the magnitude of the force on the box? |
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Definition
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Term
| a two kg mass is held 4 meters above he ground, what is teh approximate potentil eergy of the mass with respect to the ground? |
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Definition
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Term
| using one thousnad jouls of work, a toy elevator is raised, from the ground floor, to the second floorin 20 seconds, the power needed to do this job was? |
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Definition
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Term
| to in]dentical arrows, one with twice the kinetic energy as the other, are fired into a haybail, the faster arrow will penetrate? |
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Definition
| twice as far as the slower arrow. |
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Term
| a car moves four times as fast as another identical car. compared to the slower car, the faster car has... |
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Definition
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Term
| a ball is projected into the air with 100j of kinetic energy, which is transformed to gravitational potential energy at the top of its trajectory. when it returns to its original level after encountering air resistance, its kinetic energy is... |
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Definition
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Term
| a machine puts out 100 watts, for power fr every 1000 watts put into it. the efficency of the machine is? |
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Definition
|
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Term
|
Definition
| that gravity is universal |
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Term
| accoridng to newton, the greater the masses of interacting objects, the.. |
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Definition
| greater the gravitational force between them |
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Term
| accoriding to newton,doubling the distance between two interacting objects.... |
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Definition
| divides by 4 he gravitational force between them. |
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Term
| inside a freely falling elevator, there would be no..? |
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Definition
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Term
| the earths gravitationl feild extends...? |
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Definition
| both inside and outside the earth and throughout the entire universe. |
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Term
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Definition
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Term
| an object is placed exactly between the earth and the moon, the object will fall toward the.. |
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Definition
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Term
| the amount of gravitational force that acts on the space shuttle while in orbit is... |
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Definition
| almost as much as the shuttles weight on the sureface |
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Term
| a very massive object A and a less massive object B move torward eachother under the influence of gravitation. which force, if either, if greater? |
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Definition
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Term
| two object move toward eachother because of gravity, as the objects get closer and closer the force between them.... |
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Definition
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Term
| two objects move toward eachother becasue of gravity, as the objects get closer and closer, the acceleration of each.. |
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Definition
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Term
| passengers in a highflying jet fill their normal weight in flight, while passengers, in an orbiting space shutle do not. this is because passegers in shuttles are... |
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Definition
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Term
| no force due to the earths gravity is acting on the astronauts inside the orbiting space shuttle. this statement is.. |
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Definition
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Term
| the reason the moon does not crash into the earth is that.. |
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Definition
| the moon has a significant tangable speed. |
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Term
| the factor most directly responsible for making a balck hole invisible is its... |
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Definition
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Term
| if the sun collapsed to a black hole, the earths gravitational attraction, to it would b... |
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Definition
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Term
| how far must one travel to get away from the earths grvitational field? |
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Definition
| to a region beyond the solar system. |
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Term
| the main reason ocean tides exhist is that the pull of the moon... |
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Definition
| is greater on the oceans closer to the moon than oceans further from the moon. |
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Term
| suppose the moon had twice as much mass as it now does, and still orbited the earth at the same distance..in that case, the ocean bugkes on earth would be.. |
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Definition
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Term
| accordng to keplers laws, the path of planets about the sun are, |
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Definition
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Term
| a rock is thrown upward at 50 degrees, with respect to the horizontal. as it rises, neglecting air drag, its vertical component of velocity.... |
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Definition
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Term
| a rock is thorwn upward at 50degrees with respect, to the horizontal as it rises neglecting air drag its horizontal component of velocity.. |
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Definition
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Term
| a stone is thrown, horizontaly from the top of a cliff, one second after it has left your hand, its vertical distance below the top of the clif s... |
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Definition
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Term
| throw an object pward at a 45 degree angle, with no gravity it will folow a straight line path. butbecaue of gravirty, at the end of the second it is.. |
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Definition
| about 5 meters below the straight line. |
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Term
| roll a bowling ball off the ledge of a table, as it falls, its hoizontal component of velocity.. |
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Definition
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Term
| a bullet fired horizontally from a rifle begins to fall.. |
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Definition
| as soon as it leaves the barrell |
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Term
| a projectile is launched verticaly upward 50 m/s. if air resitance is negligible its speed upon returning to its starting point is.. |
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Definition
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Term
| an earth satellite is simply a projectile... |
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Definition
| freely falling aorund the earth |
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Term
| earth satellites are 100 km high. so as to be above the earths, |
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Definition
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Term
| a hunter on level ground fires a bullet at the angle of 10 degrees, above the horizontal, while simuetaneously droping. another bullet fromm the level of the rifle, which bullet will hit the gorund first? |
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Definition
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Term
| an object is dropping and freely falls to the ground with an accleration of 1 g. if it is thrown upward at an angle, instead its accl. will be what? |
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Definition
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Term
| a projectile is launched at grond level, and angled at 15 degrees, above the horiz. and lands downrange.. |
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Definition
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Term
| two projectiles are fired form ground level at equal speeds, but diff, angles, one is fired at 30 d and the other at 60 d. the projectile to hit the ground first, will be the one fired at (no air resistance).. |
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Definition
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Term
| the groundspeed of an airplane thathas an air speed of 200km/h when it is in a 200 km/h cross wind, is.. |
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Definition
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Term
| the tangentile velocity, of an earth satlellite, is its velocity...? |
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Definition
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Term
| the radial velocity of an earths satelittle is its velocity... |
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Definition
| perpendicular to the surface of the earth |
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Term
| planets would crash inot the sun if it werent for? |
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Definition
| their tangentile velocities.. |
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Term
| circular path of a saletlite orbitting the erth is caracteriszed by a contnt |
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Definition
| acceleration, speed, radial distance |
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Term
| satelilltes travel fatest when... |
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Definition
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Term
| speeds of the planet abiut the sun, depends on.. |
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Definition
| their distance from the sun. |
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Term
| a vertical oriented rocket that is omehow able to maintain a continuous upward veocity of 8 km/s will... |
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Definition
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