Term
Suppose than an object travels from one point in space to another. How can you compare the displacement and the distance traveled? 

Definition
The displacement is either less than or equal to the distance traveled. 


Term
A new car manufacturer advertises that their car can go from 0 to 60 in 8 seconds. This is a description of 

Definition


Term
An object moving in the positive xaxis experiences an acceleration of 2.0 m/s^2. This means the object is... 

Definition
increasing in velocity by 2.0m/s^2 in every second 


Term
An object is moving with constant nonzero velocity in the positive xaxis. The position versus time graph of this object is... 

Definition
a horizontal straight line 


Term
If the position versus time graph of an object is a horizontal line, the object is... 

Definition
moving with constant nonzero speed 


Term
An object moves 15m North and then 11m South. Find both the distance traveled and the magnitude of the displacement vector. 

Definition


Term
A boat can move at 30kmph in still water. How long will it take to move 12 km upstream in a river flowing 6kmph? 

Definition


Term
55mph is how many m/s? (1mi = 1609 m) 

Definition
25 m/s
Explanation:
8849m/3600s = 24.5m/s 


Term
What must be your average speed in order to travel 350 km in 5.15 hours? 

Definition
68km/h
Explanation:
350km/5.15 = 67.9km/h 


Term
A runner ran the marathon approximatley 42km in 2 hours and 57 minutes. What is the average speed of the runner in m/s? 

Definition
3.95 m/s
Explanation:
42km/2hr57min
42000m/10320s = 4.07m/s^2 


Term
If you are driving 72km/h along a straight road and you look to the side for 4 s, how far do you travel during this inattentive period? 

Definition
80m
Explanation:
72000m/3600s = 20m/s 


Term
A polar bear starts at the north pole. It travels 1km South, then 1 km East, then 1km NOrth, then 1 km West to return to its starting point. This trip takes 45 minutes. What was the bear's avergae velocity 

Definition
5.3 km/h
Explanation:
4km/45 min
4/.75 = 5.3km/h



Term
Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35km/h to 40km/h the first second. And from 40km.h to 45km/h the next second. What is the car's acceleration? 

Definition
5km/hxs
Explanation:
(4035)/1 = 5km/h 


Term
When something falls to the ground it accelerates. This acceleration is called the acceleration due to gravity and is symbolized by the letter "g." What is the value of "g" on Earth's surface? 

Definition


Term
A car accelerates at 2m/s^2. Assuming the car strats from rest, how much time does it need to accelerate to a speed of 20m/s? 

Definition
10 seconds
Explanation:
t = v/a
t = 20/2
t = 10 


Term
A train moves down the track with a constant velocity. What might the area under the velocity versus time graph tell us about the motion of the train? 

Definition


Term
As an object falls freely in a vaccum, it's 

Definition


Term
In the absence of air resistance objects fall at constant 

Definition


Term
A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be 

Definition
the same as the speed it had when thrown upwards 


Term
Suppose an object is in free fall. Each second the object falls 

Definition
a larger distance than in the second before 


Term
Consider drops of water leaking from a water faucet. As the drops fall they 

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
When a basketball player jumps to make a shot, once the feet are off the floor the jumper's acceleration 

Definition


Term
A ball is thrown straight up. At the top of its path its instantaneous speed is 

Definition


Term
A ball is thrown straight up. At the top of its path, its acceleration is 

Definition


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

Definition


Term
A freely falling object strats from rest. After falling for 6 seconds it will have a speed of about 

Definition


Term
Acceleration is defined as the change in 

Definition
velocity divided by the time interval 


Term
Suppose you are in a car that is going around a curve. The speedometer reads a constant 30m/h. What is not true? 

Definition
Your velocity is constant. 


Term
A car starts from rest and after 7 seoncds it is moving 42m/s. What is the car's average acceleration? 

Definition
6m/s^2
Explanation:
a = v/t
a = 42/7
a = 6 


Term
When representing velocity as a vector 

Definition
1.The direction of the arrow shows the direction of motion
2. The length of the arrow represents the speed
3.The length of the arrow is drawn to a suitable scale
ALL OF THESE ABOVE 


Term
In the absence of air friction, the horizontal component of a projectile's velocity doesn't change as the projectile moves


Definition


Term
A ball is thrown into the air at some angle. At the very top of the ball's path, it's velocity is 

Definition


Term
In the absence of air resistance, at what other angle will a thrown ball go the same distance as one thrown at an angle of 75 degrees? 

Definition


Term
When you sit on a chair, the resultant force on you is 

Definition


Term
In the absence of an external force, a moving object will 

Definition
move with constant velocity 


Term
You are standing in a moving bus, facing forward, and you suddenly fall forward as the bus comes to an immediate stop. What force caused you to fall forward? 

Definition
There is not a force leading to your fall 


Term
Which of Newton's laws best explains why motorists should buckle up? 

Definition


Term
When the rocket engines on the starship NOPAINNOGAIN are suddenly turned off, while traveling in empty space, the straship will 

Definition


Term
In the diagram shown, the unknown vector is...
[image]
[image]
[image] 

Definition


Term
A 10kg mass slides down a flat hill that makes an angle of 10 degrees with the horizontal. If friction is negligible, what is the resultant force on the sled? 

Definition
17N
Explanation:
n = 1.7(10)
n = 17 


Term
[image]
A traffic light of weight 100N is supported by two ropes as shown in Fig.42. What are the tensions in the ropes? 

Definition
83 N
Explanation:
sin37 = 100/h
h = 83 


Term
What is the speed of an object at rest? 

Definition


Term
Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a yaxis.) 

Definition
A cat jumps from a tree limb to the ground. 


Term
Which of the following units is thet SI unit of velocity? 

Definition


Term
[image]
Position
In the graph above, what is the correct description of any location to the left of the zero? 

Definition


Term
In the graph above, a toy car rolls from +3m to +5m. Which of the following statements is true? 

Definition


Term
Suppose you are given a positon versus time graph. The slope of a line drawn tangent to a point on the curve of this graph describes what quantity? 

Definition


Term
Which of the following line segments on a position versus time graph is physically impossible? 

Definition


Term
Acceleration is defined as 

Definition
the rate of changing velocity 


Term
Which of the following is the equation for acceleration? 

Definition


Term
What is the SI unit of acceleration? 

Definition


Term
If you know the aaceleration of a car, its initial veloctiy, and the time interval, which of the following can you predict? 

Definition
1. The direction of the car's final velocity
2. the magnitude of the car's final velocity
3. the displacement of the car
ALL OF THE ABOVE 


Term
When a car's velocity is positive and its acceleration is negative, what is happening to the car's motion? 

Definition


Term
When a car's velocity is negative and its acceleration is negative, what is happening to the car's motion? 

Definition


Term
Which of the following line segments on a velocity versus time graph is physically impossible? 

Definition


Term
The motion of a ball on an inclined plane is described by the equation: Δx = 1/2a(Δt)^{2}. Which of the following quantities must have a value of zero? 

Definition


Term
Acceleration due to gravity is also called 

Definition


Term
Which of the following statements applies to the motion of a ball rising and then falling in free fall? 

Definition
I. The ball has constant acceleration as it moves upward.
II. The ball has constant acceleration at the top of its path.
III. The ball has constant acceleration as it moves downward.
I, II, and III 


Term
A baseball catcher throws a ball vertically upward and catches it in the same spot as it returns to the mitt. At what point in the ball's path does it experience zero velocity and nonzero acceleration at the same time? 

Definition


Term
When there is no air resistance, obejcts of different masses dropped from rest 

Definition
fall with equal accelerations and with equal displacements 


Term
Objects that are falling toward Earth in free fall move 

Definition


Term
Which would hit the ground first if dropped from the same height in a vacuum a feather or a metal bolt? 

Definition
They would hit the ground at the same time 


Term
Which would fall with greater acceleration in a vacuuma leaf or a stone? 

Definition
They would accelerate at the same rate. 


Term
Two students are standing on a fire escape, one twice as high as the other. Simultaneously, each drops a ball. If the first ball strikes the ground at time Δt_{1}, when will the second ball strike the ground?(Disregard air resistance. Assume a=g=9.81m/s^{2}) 

Definition


Term
Which of the following is a physical quality that has a magnitude but no direction? 

Definition


Term
Which of the following is a physical quality that has both magnitude and direction? 

Definition


Term
Identify the following quantites as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity. 

Definition


Term
Identify the following quantites as scalar or vector: the speed of a snail, the time it takes to run a mile, the freefall acceleration. 

Definition


Term
For the winter, a duck flies 10m/s due south against a gust of wind with a speed of 2.5m/s. What is the resultant velocity of the duck? 

Definition


Term
Multiplying or dividing vectors by scalars results in 

Definition


Term
A car travels downa road at a certain velocity, v_{car}. The driver slows down so that the car is traveling only half as fast as before. Which of the following is the correct expression for the resulting velocity? 

Definition


Term
A student walks from the door of the house to the end of the driveway and realizes that he missed the bus. The student runs back to the house, traveling three times as fast. Which of the following is the correct expression for the return velocity if the initial velocity is v_{student}. 

Definition


Term
Which of the following is the best coordinate system to analyze a painter climbing a ladder at an angle of 60dgrs to the ground? 

Definition
xaxis: horizontal along the ground; yaxis: up and down 


Term
An ant on a picnic table travels 3 x 10^{3} cm eastward, then 25cm northward, and finally 15cm westward. What is the magnitude of the ant's displacement relative to its original position? 

Definition


Term
In a coordinate system, a vector is oriented at angle θ with respect to the xaxis. The x component of the vector equals the vector's magnitude multiplied by which trigonometric function? 

Definition


Term
In a coordinate system, a vector is oriented at angle θ with respect to the xaxis. The y component of the vector equals the vector's magnitude multiplied by which trigonometric function? 

Definition


Term
Find the resultant of these two vectors:2 x 10^{2} units due east and 4 x 10^{2} units 30dgrs north of west. 

Definition
248 units, 53.9dgrs north of west 


Term
Which of the following is an example of projectile motion? 

Definition


Term
Which of the following is not an example of projectile motion? 

Definition
a hotair balloon drifting toward Earth 


Term
What is the path of a projectile (in the absence of friction)? 

Definition


Term
A passenger on a bus moving east sees a man standing on a curb. From the passenger's perspective, the man appears to 

Definition
move west at a speed that is equal to the bus's speed 


Term
A piece of chalk is dropped by a teacher walking at a speed of 1.5m/s. From the teacher's perspective, the chalk appears to fall 

Definition


Term
A jet moving at 500km/h due east is in a region where the wind is moving at 120km/h in a direction 30dgrs north of east. What is the speed of the aircraft relative to the ground? 

Definition


Term
A force does not work on an object if a component of the force 

Definition
is parallel to the displacement of the object 


Term

Definition
the displacement is not zero 


Term

Definition


Term
If the sign of work is negative... 

Definition
the displacement is in the direction opposite the force 


Term
IN which of the following scenarios is work done? 

Definition
A car decelerates while traveling on a flat stretch of road 


Term
In which of the following scenarios is no net work done? 

Definition
a car travels at a constant speed on a flat road 


Term
A child moving at constant velocity carries a 2N icecream cone 1m across a level surface. What is the net work done on the icecream cone? 

Definition


Term
A worker does 25 J of work lifting a bucket, then sets the bucket back down in the same place. What is the total net work done on the bucket? 

Definition


Term
A construction worker pushes a wheelbarrow 5m with a horizontal force of 50N. How much work is done by the worker on the wheelbarrow? 

Definition


Term
Which of the following energy forms is associated with an object in motion? 

Definition


Term
Which of the following energy forms is associated with an object due to its position? 

Definition


Term
Ball A has triple the mass and speed of ball B. What is the ratio of the kinetic energy of ball A to ball B? 

Definition


Term
If friction is the only force acting on an object during a given physical process, which of the following assumptions can be made in regard to the object's kinetic energy? 

Definition
the kinetic energy decreases 


Term
the main difference between kinetic energy and potential energy is that 

Definition
kinetic energy invovles motion and potential energy involves position 


Term
gravitational potential energy is always measured in relation to 

Definition


Term
Which of the following is a true statement about the conservation of energy? 

Definition
mechanical energy is always conserved 


Term
Why doesn't the principle of mechanical energy conservation hold in situations when frictional forces are present? 

Definition
kinetic energy is not completely converted to a form of potential energy 


Term
Which of the following is the rate at which energy is transferred? 

Definition


Term
Which of the following equations can be used to directly calculate an object's momentum, p? 

Definition


Term
What are the SI units for momentum? 

Definition


Term
When comparing the momentum of two moving objects, which of the following is correct? 

Definition
The less massive object will have less momentum if the velocities are the same 


Term
Which of the following has the greatest momentum? 

Definition
a tortoise with a mass of 275kg moving at velocity of 0.55m/s 


Term
A person sitting in a chair with wheels stands up, causing the chair to roll backward across the floor. The momentum of the chair 

Definition
was zero while stationary and increased when the person stood 


Term
Which of the following equations can be used to directly calculate the change in an object's momentum? 

Definition


Term
If a force is exerted on an object, which statement is true? 

Definition
A small force applied over a long time interval can produce a large change in the object's momentum 


Term
Which of the following situations is an example of a visible change in momentum? 

Definition
A baseball is hit by a bat 


Term
Which of the following situations is an example of a significant change in momentum? 

Definition
a tennis ball is hit into a net 


Term
The impulse experienced by a body is equivalent to the body's change in 

Definition


Term
Which of the following statements properly relates the variables in the equation FΔt = Δp? 

Definition
A large constant force acting over a long time interval causes a large change in momentum. 


Term
A soccer ball collides with another soccer ball at rest. The total momentum of the balls 

Definition


Term

Definition
momentum is always conserved 


Term
A player catches a ball. Consider the action force to be the impact of the ball against the player's glove. What is the reaction to this force? 

Definition
the force the glove exerts on the ball 


Term
an unfortunate bug splatters against the windshield of a moving car. Compared to the deceleration of the car, the deceleration of the bug is 

Definition


Term
Earth pulls on the moon and similarly the moon pulls on Earth. This is evidence that the 

Definition
1. Earth and moon are simply pulling on each other
2. Earth's and moon's pulls comprise an actionreaction pair
BOTH OF THESE 


Term
A rocket is able to accelerate in the vacuum of space when it fires its engines. The force that propels the rocket is the force 

Definition
of the exhaust gases on the rocket 


Term
Your friend says that the heavyweight champion of the world cannot exert a force of 95N on a peice of tissue paper with his best punch. The tissue paper is held in midair, no wall and no tricks. 

Definition
You agree that it can't be done. 


Term
Suppose two people, one having three times the mass of the other, pull on opposite sides of a 20 meter rope while on frictionless ice. After a brief time, they meet. The more massive person slides a distance of... 

Definition


Term
In the absence of an external force, a moving object will 

Definition
move with constant velocity 


Term
A rocket moves through empty space in a straight line with constant speed. It is far from the gravitational effect of any star or planet. Under these conditions, the force that must be applied to the rocket in order to sustain its motion is 

Definition


Term
A constant net force acts on an object. Describe the motion of the object 

Definition


Term
The acceleration of an object in inversely proportional to 

Definition


Term
A net force F acts on a mass m and produces an acceleration s. What acceleration results if a net force 2F acts on mass 4m? 

Definition


Term
The time for one cycle of a periodic process is called the 

Definition


Term
For a periodic process, the number of cycles per unit time is called the 

Definition


Term
For vibrational motion, the maximum displacement from the equilibrium point is called the 

Definition


Term
A simple pendulum consists of mass M attatched to a weightless string of length L. For this system, when undergoing small oscillations 

Definition
the frequency is independent of the mass M 


Term
When the mass of a simple pendulum is tripled, the time required for one complete vibration 

Definition


Term
What happens to a simple pendulum's frequency if both its length and mass are increased? 

Definition


Term
Simple pendulum A swings back and forth at twoce the frequency of simple pendulum B. Which statement is correct? 

Definition
The length of B is four times the length of A 


Term
If you take a given pendulum to the Moon, where the acceleration of gravity is less than on Earth, the resonant frequency of the pendulum will 

Definition


Term
In a wave, the maximum displacement of points of the wave from equilibrium is called the wave's 

Definition


Term
The distance between successive crests on a wave is called the wave's 

Definition


Term
The number of crests of a wave passing a point per unit time is called the wave's 

Definition


Term
For a wave, the frequency times the wavelength is the wave's 

Definition


Term
The frequency of a wave increases. What happens to the distance between successive crests if the speed remains constant? 

Definition


Term
In seismology, the S is a transverse wave. As an S wave travels through the Earth, the relative motion between the S wave and the particles is 

Definition


Term
Two wave pulses with equal opposite amplitudes pass eachother on a string, one is traveling toward the right and the other toward the left. At the point that they occupy the same region of space at the same time 

Definition
constructive interference occurs 


Term
Two wave pulses pass eachother on a string. The one traveling toward the right has a positive amplitude, while the one traveling toward the left has an equal amplitude in the negative direction. At the point that they occupy the same region of space at the same time 

Definition
destructive interference occurs 


Term
When obeject is moving with uniform circular motion, the object's tangential speed 

Definition


Term
When an object is moving with uniform circular motion, the centripetal acceleration of the object 

Definition
is directed toward the center of motion 


Term
What is the term for the net force directed toward the center of an object's circular path? 

Definition


Term
Which of the following can be centripetal force? 

Definition
1.friction
2.gravity
3.tension
ALL OF ABOVE 


Term
The centripetal force on an object in circular motion is 

Definition
in the plane of the object's motion and perpendicular to the tengential speed 


Term
When a car makes a sharp left turn, what causes the passengers to move toward the right side of car? 

Definition


Term
When calculating the gravitational force between two extended bodies, you should measure the distance 

Definition
from the center of each body 


Term
According to Kepler's laws of planetary motion 

Definition
if Δt1 = Δt2, then A1 = A2 


Term
How would the speed of Earth's orbit around the sun change if Earth's distance from the sun increased by 4 times?


Definition
It would decrease by a factor of 2



Term
How would the speed of Earth's orbit around the sun change if Earth's mass increased by 4 times? 

Definition
it would increase by a factor of 2 


Term
Is it possible for an object moving with a constant speed to accelerate? Explain. 

Definition
Yes, although the speed is constant, the direction of velocity can be changing. 


Term
An object moves in a circular path at a constant speed. Compare the direction of the object's velocity and acceleration vectors. 

Definition
The vectors are perpendicular 


Term
A car goes around a curve of radius r at a constant speed v. Then it goes around the same curve at half of the original speed. What is the centripetal force on the car as it goes around the curve for the second time, compared to the first time? 

Definition


Term
Is it possible for an object moving around a circular path to have both centripetal anf tengential acceleration? 

Definition
Yes, this is possible if the speed is changing. 


Term
Two objects attract each other gravitationally. If the distance between their centers is cut in half, the gravitational force 

Definition


Term
Compared to its mass on Earth, the mass of an object on the Moon is 

Definition


Term
Suppose a satellite were orbiting the Earth just above the surface. What is its centripetal acceleration? 

Definition


Term
A hypothetical planet has a mass of half that of the Earth and a radius of twice that of the Earth. What is the acceleration due to gravity on the planet in terms of g, the acceleration due to gravity at Earth? 

Definition

