Term
an object in mechanical equilibrium is an object... 

Definition
at rest, moving with constant velocity, and having no acceleration 


Term
when you stand at rest on a pair of bathroom scales, the readings on the scales will always.. 

Definition
add up to equal your weight 


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... 

Definition


Term
the force of friction on a sliding object is 10 n. the applied force needed to maintain a constant velocity is.. 

Definition


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... 

Definition


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... 

Definition


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... 

Definition
always has forces hat oppose their motion 


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... 

Definition


Term
if no external forces are acting, on a moving object, it will.. 

Definition
continue moving at the same velocity 


Term
two measurements necessary for calculating average speed are... 

Definition


Term
a car maintains a constant velocity of 100 km/hr during this interval, its acceleration is... 

Definition


Term
while an object near the earths surface is in freefall its... 

Definition


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... 

Definition


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... 

Definition
grater than the second before 


Term
if a freely falling object were somehow equipped with a speedometer its speed reading would increase each second by.. 

Definition


Term
if a car increases it velocity form zero to 60 km/h in 10 secs its acceleration is... 

Definition


Term
if a rocket initially at rest accelerates at a rate of 50m/s2 for a minute, its speed will be what? 

Definition


Term
it takes 6 seconds for a stone to fall to the bottom of a mine shaft, how deep is the shaft? 

Definition


Term
in each second of fall, the distance a freely falling object will fall is.. 

Definition


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... 

Definition


Term
while a car travels around a circular track at a constant speed, its... 

Definition


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.. 

Definition


Term
at one instant an object in free fall is moving downward at 50 m/s, 1 second later, its speed should be about.. 

Definition


Term
at one instant a heavy object in the air is moving upward, at 50 m/s. 1 second later, its speed is approximetaley ... 

Definition


Term
disregarding air resistance, objects fall with constant... 

Definition


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... 

Definition
less than the speed it had when thrown upwards. 


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.. 

Definition


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.. 

Definition


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, 

Definition


Term
consider drops of water that lead to a stead rate, form a dipping faucet. as the drops fall, they 

Definition


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? 

Definition


Term
when a rock thrown straight upwards gets to the exact top of its path, its.. 

Definition
velocity is zero, and acceleration is about 10m/s/s 


Term
a kilogram is a measurment of a objects.. 

Definition


Term
compared to a 1kg block of solid iron, a 2kg block of solid iron has twice as much 

Definition
inertia, mass, and volume 


Term

Definition
the gravitational attraction force between you and the earth. 


Term
if one object has twice as much mass as another object it also as twice as much... 

Definition


Term
compared to the mass of a certain object on earth, the mass of the same object on the moon is.. 

Definition


Term

Definition


Term
a force is a vector quantity because it has both... 

Definition


Term
an object is propelled along a straight line path by a force if the net force were doubled, the objects acceleration would be... 

Definition


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... 

Definition


Term
the force of friction on a sliding object is 10 N the applied force to maintain constant velocity is.. 

Definition


Term
which has zero acceleration? an object.... 

Definition
at rest, moving at constant velocity, in mechanical equillibrium. 


Term
a 1kg mass at the end of earths surface weighs... 

Definition


Term
hang a pair of gym rings, and the upward support forces of he rings, will always 

Definition
add up to equal your weight. 


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? 

Definition


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? 

Definition


Term
if the mass of an object does not change, a constant net force on the object produces constant... 

Definition


Term
an object following a straight line path at constant speed.... 

Definition


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.... 

Definition
at the same time as the light block 


Term
na rocket becomes progressively easier to accelerate as it travels upward from the ground, mainly because... 

Definition
the mass of the rocket decreases as fuel is burned. 


Term
a rocket is thrown vertically into the air. at the very top of it trajectory the net force on it is... 

Definition


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? 

Definition


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... 

Definition
continues at the speed it had when it encountered the second force 


Term
a skydiver of mass 100kg experiences air resistance of 500N, and an acceleration of.. 

Definition


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? 

Definition


Term
if less horizontal force is applied to a sliding object then is needed to maintain a constant velocity... 

Definition
the object eventually slides to a stop. 


Term
two factors that greatly affect air resistance on falling objects are the... 

Definition
size and speed of the object. 


Term
when a falling object has reached its terminal velocity, its accelertion is... 

Definition


Term
a skydiver jumps form a high flying plane. as her velocity of fall increases, her acceleration.. 

Definition


Term
a skydiver terminal velocity will be greatest if he falls... 

Definition


Term
for an action force, there but be a reaction force that... 

Definition
is exactly equal in magnitude. 


Term
an archer shoots an arrow. consider the action force to be the bow string against the arrow. the reaction to the force is... 

Definition
arrows push against the bow string. 


Term
a person is attracted to the center of the earth by 500N gravitational force. the earth is attracted toward the person with a froce of... 

Definition


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... 

Definition


Term
two people, one twice as massive as the other, attempt a tug of war, with 12 meters of massless rope on a frictionless ice. after a brief time they meet. the heavier person slides the distance of... 

Definition


Term
which of the following has the largest momentum? relative to the earhts surface.. 

Definition
a pick up truck speeding along a highway. 


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... 

Definition


Term
a rifle recoils while firing a bullet, the peed of the rifles recoil is... 

Definition
small because the rifle has much more mass than the bullet. 


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... 

Definition
time of impact is increased. 


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.. 

Definition


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.. 

Definition


Term
a karate expert breaks a cement block with her bear hand. the magnitude of the force exerted by her hand is... 

Definition
identical to the force applied to the block. 


Term
the force that accelerates a rocket into outer space, is exerted on the rocket by the.. 

Definition


Term
two billiard balls having the same mass and speed, roll towards eachother, what is their combined momentum after they meet? 

Definition


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 

Definition


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? 

Definition


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... 

Definition
move in the opposite direction butin a lower speed.. 


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. 

Definition


Term
if you push a half an hour or a whole hour against a sationary wall.... 

Definition
no work on the wall is done in either case. 


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.. 

Definition


Term
if you do work on an obect in 1/3rd the usual time, our power output is.. 

Definition
3 times the usual power output. 


Term
if the object is raised twice as high, its potential energy will be.. 

Definition


Term
a one thousand kilogram car and a 2000 kg car are hoisted the same distance. raising the more massive car requires... 

Definition


Term
an obect that has kinetic energy, must be... 

Definition


Term
an object may have potential energy because of its... 

Definition


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... 

Definition


Term
when an automobile is breaked to a stop, its kinetic energy is transformed to... 

Definition


Term
a ball rolling down a incline has its maximum potential energy at... 

Definition


Term
a ball roling down an incline has it maximum kinetic energy at, 

Definition


Term
what task requries the most work? lifting a 50 kg sack, 2 meters, or lifting a 25 kg sack, 4 meters 

Definition


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... 

Definition


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? 

Definition


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? 

Definition


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? 

Definition


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? 

Definition


Term
to in]dentical arrows, one with twice the kinetic energy as the other, are fired into a haybail, the faster arrow will penetrate? 

Definition
twice as far as the slower arrow. 


Term
a car moves four times as fast as another identical car. compared to the slower car, the faster car has... 

Definition


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... 

Definition


Term
a machine puts out 100 watts, for power fr every 1000 watts put into it. the efficency of the machine is? 

Definition


Term

Definition
that gravity is universal 


Term
accoridng to newton, the greater the masses of interacting objects, the.. 

Definition
greater the gravitational force between them 


Term
accoriding to newton,doubling the distance between two interacting objects.... 

Definition
divides by 4 he gravitational force between them. 


Term
inside a freely falling elevator, there would be no..? 

Definition


Term
the earths gravitationl feild extends...? 

Definition
both inside and outside the earth and throughout the entire universe. 


Term

Definition


Term
an object is placed exactly between the earth and the moon, the object will fall toward the.. 

Definition


Term
the amount of gravitational force that acts on the space shuttle while in orbit is... 

Definition
almost as much as the shuttles weight on the sureface 


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? 

Definition


Term
two object move toward eachother because of gravity, as the objects get closer and closer the force between them.... 

Definition


Term
two objects move toward eachother becasue of gravity, as the objects get closer and closer, the acceleration of each.. 

Definition


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... 

Definition


Term
no force due to the earths gravity is acting on the astronauts inside the orbiting space shuttle. this statement is.. 

Definition


Term
the reason the moon does not crash into the earth is that.. 

Definition
the moon has a significant tangable speed. 


Term
the factor most directly responsible for making a balck hole invisible is its... 

Definition


Term
if the sun collapsed to a black hole, the earths gravitational attraction, to it would b... 

Definition


Term
how far must one travel to get away from the earths grvitational field? 

Definition
to a region beyond the solar system. 


Term
the main reason ocean tides exhist is that the pull of the moon... 

Definition
is greater on the oceans closer to the moon than oceans further from the moon. 


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.. 

Definition


Term
accordng to keplers laws, the path of planets about the sun are, 

Definition


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.... 

Definition


Term
a rock is thorwn upward at 50degrees with respect, to the horizontal as it rises neglecting air drag its horizontal component of velocity.. 

Definition


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... 

Definition


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.. 

Definition
about 5 meters below the straight line. 


Term
roll a bowling ball off the ledge of a table, as it falls, its hoizontal component of velocity.. 

Definition


Term
a bullet fired horizontally from a rifle begins to fall.. 

Definition
as soon as it leaves the barrell 


Term
a projectile is launched verticaly upward 50 m/s. if air resitance is negligible its speed upon returning to its starting point is.. 

Definition


Term
an earth satellite is simply a projectile... 

Definition
freely falling aorund the earth 


Term
earth satellites are 100 km high. so as to be above the earths, 

Definition


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? 

Definition


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? 

Definition


Term
a projectile is launched at grond level, and angled at 15 degrees, above the horiz. and lands downrange.. 

Definition


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).. 

Definition


Term
the groundspeed of an airplane thathas an air speed of 200km/h when it is in a 200 km/h cross wind, is.. 

Definition


Term
the tangentile velocity, of an earth satlellite, is its velocity...? 

Definition


Term
the radial velocity of an earths satelittle is its velocity... 

Definition
perpendicular to the surface of the earth 


Term
planets would crash inot the sun if it werent for? 

Definition
their tangentile velocities.. 


Term
circular path of a saletlite orbitting the erth is caracteriszed by a contnt 

Definition
acceleration, speed, radial distance 


Term
satelilltes travel fatest when... 

Definition


Term
speeds of the planet abiut the sun, depends on.. 

Definition
their distance from the sun. 


Term
a vertical oriented rocket that is omehow able to maintain a continuous upward veocity of 8 km/s will... 

Definition

