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AP 1 1st Half Review

Total questions: 88

Worksheet time: 1hrs 7mins

Name
Class
Date
1.

Sam is hover boarding down they hall at a constant velocity. Assuming there is friction, which of the following must be true?

a)

The force applied by the board must be greater than the frictional force

b)

The frictional force must equal the force applied by the board

c)

The force applied must equal zero

d)

There is not enough information

2.

Camille launches has a catapult that changes the velocity of a ball (m= 2 kg) from 0 to 10 m/s in one sec. What is the average force that is exerted on the ball during launch?

a)

20 N

b)

5 N

c)

8 N

d)

0.2 N

3.
What is happening between 3 seconds and 4 seconds?
a)
The object is moving in a negative direction.
b)
The object is returning to its starting position.
c)
The object is slowing to a stop.
d)
The object is changing direction.
4.
"If we apply a ___________ to an object, its __________________ will change and it will  ______________."
a)

force, accelerate, gravity

b)

accelerate, inertia, gravity

c)

force, velocity, accelerate

d)

velocity, gravity, inertia

5.

If μk = 0.65 and μs = 0.7, acceleration would be equal to

a)

0 m/s/s

b)

9.8 m/s/s

c)

3.35 m/s/s

d)

-2.63 m/s/s

6.
A 80 kg skydiver is free falling at a constant velocity of 19 m/s. What is the net (total) force acting on her?
a)

1,520 N

b)

0 N

c)

4.21 N

d)

Not enough information to answer

7.
The Earth pulls downward on a pingpong ball with a force  of 1N. If this is the "action" force, what is the "reaction" force?
a)
The ground exerts a force of 1N on the ping pong ball
b)
The ping pong ball exerts a force of 1 N on the Earth
c)
The ping pong ball pushes down on the earth with a force of 1N
d)
The is no reaction force when a gravitational force is involved
8.
At 60 seconds, how far had this object traveled? 
a)

0 m

b)

10 m

c)

20 m

d)

40 m

9.
The graph respresents
a)
no motion
b)
constant velocity
c)
increasing velocity
d)
decreasing velocity
10.
At what time did runner A pass runner B?
a)
0 seconds
b)
1 second
c)
2 seconds
d)
3 seconds
11.
Assuming both objects are at rest, which object is more massive? M1 or M2?
a)

M1 is more massive

b)

M2 is more massive

c)

both M1 and M2 are the same mass

12.

A man standing on a scale in an elevator notices that the scale reads 40 newtons greater than his normal weight. Which type of movement of the elevator could cause this greater-than-normal reading?

a)

accelerating upward

b)

accelerating downward

c)

moving upward at a constant speed

d)

moving downward at a constant speed

13.

Three forces of equal magnitude act on the box shown. One force is upward, one downward, and one rightward. Which of the following statements must be true based on this information? Select two answers.

a)

The box must have a rightward component of velocity.

b)

The box has no vertical component of velocity.

c)

The acceleration of the box is directed to the right.

d)

The velocity of the box is changing with time.

14.
An apple weighs 1 N. The net force on the apple when it is in free fall is
 
a)

 0 N.

b)

0.1 N.

c)

1 N.

d)

9.8 N

15.
The red line shows...
a)
A stationary object.
b)
An object with constant velocity.
16.
What is happening at D?
a)
Stationary
b)
Accelerating
c)
Fast steady speed; moving away from the starting position
d)
Slower steady speed; moving away from the starting position
17.
Motion sensors recorded the following data about a runner during a cross-country race. During which segment of the race did the runner have the greatest speed?
a)

W

b)

X

c)

Y

d)

Z

18.
What does this graph represent?
a)

Constant Speed

b)

Acceleration

c)

Deacceleration

d)

Not moving

19.
Which graph represents zero acceleration (constant velocity)?
a)

A

b)

B

c)

C

d)

D

20.
Which runner got a head start?
a)
red line runner
b)
blue line runner
21.

If there is no friction, then the acceleration would be equal to

a)

mg

b)

sin(θ)mg

c)

g

d)

sin(θ)g

22.
A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
23.
Which of the following is true about the system shown?
a)
The system is not accelerating.
b)
The tension between m2 and m1 is less than the tension between m2 and m3
c)
The acceleration of the system only depends on m3
d)
None of the other answers are true
24.
Which runner is faster?
a)
red line runner
b)
blue line runner
25.
What is happening between 2 and 3 seconds?
a)
The object is not moving.
b)
The object is not accelerating.
c)
The object is slowing down.
d)
The object is speeding up.
26.
What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N? 
a)
0.78
b)
0.51
c)
0.78 N
d)
0.58 N
27.

Given the FBD, which of the following must be true?

a)

The frictional force must be accelerating the system to the left.

b)

The box must be accelerating to the right.

c)

The FBD is incorrectly drawn. This situation isn't possible

d)

The box must be moving to the left

28.
What would the d-t graph look like for an object travelling at a constant velocity? 
a)
Horizontal line
b)
Straight line
c)
Curved line
29.

As the angle of the incline increases, what happens to the normal force?

a)

The normal force increases

b)

The normal force decreases

c)

The normal force is not affected by the incline

d)

The normal force is only dependent on the force due to gravity

30.

What is happening between 4 and 5 seconds?

a)

The object is slowing down in a negative direction.

b)

The object is slowing down in a positive direction.

c)

The object is speeding up in a positive direction.

d)

The object is speeding up in a negative direction.

31.
The rate at which distance is covered is called speed.
a)
True
b)
False
32.

A person walking along a straight line moves such that her velocity as a function of time can be represented by the graph above. At what time does the person have the same position as she had at time t = 0?

a)

At t = 5 s

b)

During the interval 5 s < t < 8 s

c)

At t = 8 s

d)

During the interval t > 8 s

33.
At 60 seconds, how far had this object traveled? 
a)
0 m
b)
10 m
c)
20 m
d)
40 m
34.

In which of the following situations is kinetic energy decreasing?

a)

A lit tinsel llama is dropped from a building.

b)

A satellite is moving in a circular orbit around the moon.

c)

A baseball is headed upward after being thrown up in the air.

d)

An elevator is moving upward at a constant velocity.

35.
Who had the greatest average speed after 100 seconds?
a)
Mike
b)
Katelyn
c)
Alex
d)
They had the same average speed
36.
Describe the motion
a)
Slow to fast;   Negative direction
b)
Fast to slow;   Negative direction
c)
Fast to slow;   Positive direction
d)
Slow to fast;   Positive direction
37.

Which of the following is not true about the system?

a)

T3 is equal to the scalar sum of the magnitudes of T2 and T1

b)

T3 is equal in magnitude to Fg

c)

The x- components of the T1 and T2 and equivalent but in opposite directions

d)

The system is in equilibrium.

38.
A  car starts from rest and after  7 seconds it is moving at 42  m/s. What is the car’s acceleration?
a)
0.17
b)
1.67
c)
6
d)
7
39.

A penguin of mass M is lifted upwards a vertical distance of H at a constant speed of v. Which of the following gives a correct expression for the power developed by the penguin as it is raised upward at constant speed?

a)

MgvMgv

b)

mgv\frac{mg}{v}

c)

mghv\frac{mgh}{v}

d)

mghmgh

40.

A roller coaster car moves down the hill. Assuming that the track is frictionless, which option represents the transfer of energy?

a)

Potential to Kinetic

b)

Kinetic to Potential

c)

Mechanical to Thermal

d)

Mechanical to Potential

41.
The SI unit for length or distance is
a)
foot (ft)
b)
inch (in)
c)
mile (mi)
d)
meter (m)
42.

Bill and Ted both push a crate of mass m crate across a floor with friction at constant speed. Bill pushes the crate d meters in 100 seconds. Ted takes 200 seconds to push the crate the same distance. Which of the following is true?

a)

More power is developed when Ted pushes the crate.

b)

More power is developed when Bill pushes the crate.

c)

An equal, non-zero amount of power is developed in both cases.

d)

Power is not developed in either case since the crate travels at constant velocity in both cases

43.
A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops? 
a)
4.20 m
b)
52.5 m
c)
105 m
d)
158 m
44.

A car of mass m is traveling at a speed of when the driver applies the brakes. The car moves a distance of d before it stops completely. What is the magnitude of the braking force required?

a)

2dv2\frac{2d}{v^2}

b)

mv22d\frac{mv^2}{2d}

c)

2v2d\frac{2v^2}{d}

d)

mvd\frac{mv}{d}

45.

Which of the following statements is true about the image above?

a)

The accelerations of the blocks will vary according to their mass

b)

The net force acting on each block is the same

c)

The blocks will experience the same acceleration

d)

The 3m box will eat the 2m and the m boxes

46.
Calculate the acceleration for segment A.
a)
2 m/s2
b)
2 m/s
c)
-2 m/s2
d)
0 m/s2
47.
The ball took 0.45 s to hit the ground 0.72 m from the table. What was the horizontal velocity of the ball as it rolled off the table?
a)
0 m/s
b)
0.63 m/s
c)
1.6 m/s
d)
2.2 m/s
48.
What happens at 4 seconds?
a)
The object changes direction.
b)
The object is at the starting point.
49.
What is happening at C?
a)
Stationary
b)
Accelerating
c)
Fast steady speed; moving away from the starting position
d)
Slower steady speed; moving away from the starting position
50.
Describe the motion in segment C
a)
Slowing down;  Positive direction
b)
Slowing down;  Negative direction
c)
Speeding up;  Negative direction
d)
Constant velocity;  Negative direction
51.
What happens to the total distance that a ball travels as it falls off the side of a cliff?
a)
The distance remains constant 
b)
The distance increases at a uniform rate
c)
The distance increases at a nonuniform rate 
d)
The distance decreases at a uniform rate
52.

The system shown consists of two objects of unequal masses, M1 and M2, and pulley with negligible mass and friction. Which of the following is true about the changes in the gravitational potential energy and kinetic energy of the system soon after the objects are released from rest?

a)

ΔU = 0 and ΔK>0\Delta U\ =\ 0\ and\ \Delta K>0

b)

ΔU>0 and ΔK>0\Delta U>0\ and\ \Delta K>0

c)

ΔU<0 and ΔK>0\Delta U<0\ and\ \Delta K>0

d)

ΔU=0 and ΔK=0\Delta U=0\ and\ \Delta K=0

53.
Problem #3
A car is traveling at a velocity of 35.0 miles per hour.  The car runs off a cliff that has an unknown height.  The car 'lands' 50.0 meters from the base of the cliff.

How long would it take the car to 'land' after exiting the rim of the cliff?
a)
1.4 seconds
b)
3.2 seconds
c)
4.8 seconds
d)
0.7 seconds
54.

Find the displacement in the first 5 seconds.

a)

8 centimeters

b)

4 centimeters

c)

2 centimeters

d)

5 centimeters

55.

A roller coaster car of mass m has a speed of 0 m/s just before it starts to go down a hill as show above. Assume the roller coaster does not encounter any friction or air resistance. What is the speed of the roller coast car at point B?

a)

gh\sqrt{gh}

b)

2gh\sqrt{2gh}

c)

gh2\sqrt{\frac{gh}{2}}

d)

2ghm\sqrt{\frac{2gh}{m}}

56.

A dude drags a car mass M across a rough floor with a force of magnitude directed at an angle theta of above the horizontal as shown. If he drags the crate for a distance D, which of the following is equal to the work by the force of friction?

a)

−Fcos⁡θD-F\cos\theta D

b)

−μmgD-\mu mgD

c)

−μ(mg−Fsin⁡θ)D-\mu\left(mg-F\sin\theta\right)D

d)

−μ(mg+Fcos⁡θ)D-\mu\left(mg+F\cos\theta\right)D

57.
What would the v-t graph look like for an object travelling at a constant velocity? 
a)
Curved line
b)
Straight line
c)
Horizontal line
58.

A block of mass M on an inclined surface is attached to a spring of negligible mass, as shown. The other end of the spring is attached to a wall, and there is negligible friction between the block and the incline. The block is pulled to a position such that the spring is stretched from its equilibrium position. The block is then released from rest. Which of the following systems can be classified as a closed system?

a)

A system consisting of the block only

b)

A system consisting of the spring and Earth

c)

A system consisting of the block and spring

d)

A system consisting of the block, spring, and Earth

59.
What happens to the velocity of a ball as it is dropped off a cliff? 
a)
It decreases at a uniform rate 
b)
It increases at a uniform rate 
c)
It is constant 
d)
It increases at a non-uniform rate
60.

An object is projected vertically upward from ground level. It rises to a maximum height H. If air resistance is negligible, which of the following must be true for the object when it is at a height H/2?

a)

Its speed is half of its initial speed.

b)

Its kinetic energy is half of its initial kinetic energy.

c)

Its potential energy is half of its initial potential energy.

d)

Its total mechanical energy is half of its initial value.

61.

A rubber ball with mass 0.20 kg is dropped vertically from a height of 1.5 m above a floor. The ball bounces off of the floor, and during the bounce 0.60 J of energy is dissipated. What is the maximum height of the ball after the bounce?

a)

0.30 m

b)

0.90 m

c)

1.19 m

d)

1.56 m

62.

Jared holds a book still two feet above his desk. He then lowers the book at a constant speed and places it on the desk. Which of the following describes the change in total mechanical-energy of the book?

a)

The total mechanical energy is unchanged since there is no net work done as the book is lowered.

b)

The total mechanical energy decreases because Jared does positive work on the book.

c)

The total mechanical energy is unchanged because no work is done on the book while it is lowered.

d)

The total mechanical energy decreases, because Jared does negative work on the book.

63.
Which position has the most potential energy?
a)
A
b)
G
c)
C
d)
D
64.

A man weighing 800 Newtons is standing in an elevator. If the elevator rises with an acceleration of 0.5 meters per second2, the force exerted by the elevator on the man will be

a)

400 N

b)

800 N

c)

1200 N

d)

1000 N

65.

A stick figure of mass running at speed grabs a light rope that hangs from a ceiling of height H and swings to a maximum height of In another room with a ceiling of height H/2, a second stick figure with mass running at the same speed grabs a light rope hanging from the ceiling and swings to a height of . How does the maximum height reached by the two stick figures compare and why?

a)

The first stick figure swings to a higher height since he swings from a higher rope.

b)

The second stick figure swings to a higher height since he has more mass.

c)

The two stick figures reach the same height, because the length of the second rope offsets the mass of the second stick figure.

d)

Both stick figures swing to the same height because they have the same initial speed.

66.

True/False: A conservative force does not change the mechanical energy of a system

a)

True

b)

False

67.

The graph on the right shows the kinetic energy over time for a lit tinsel llama in motion. At time t = 0, the potential energy of the llama is 10 J. Determine the potential energy of the object at time t = 9 s.

a)

4 J

b)

10 J

c)

8 J

d)

2 J

68.

A box of oranges slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A. What is the coefficient of kinetic friction of the surface from A to B?

a)

0.11

b)

0.26

c)

0.33

d)

0.47

69.

A baguette is dropped off the top of the Eiffel Tower. What is true concerning of the mechanical energy of the ball as it falls?

a)

The potential energy of the baguette is conserved as it falls.

b)

The sum of the kinetic and potential energies of the baguette is a constant.

c)

The kinetic energy of the baguette is conserved as it falls.

d)

A) The total energy of the object increases as it falls since it gains speed.

70.
The total energy in an isolated system can be increased.
a)

True

b)

False

71.
A pendulum is released from point C.  Which statement is correct as it  swings from C to A?
a)
The PE increases and KE decreases
b)
The KE increases and PE decreases.
c)
The PE is maximum at A.
d)
The KE is maximum at C and B.
72.
Beau throws a baseball at 23.0 m/s at an angle of 25.0 degrees relative to the ground.If the ball was caught 42.0 m from Beau, the maximum height the ball reached
a)

2.81 m

b)

4.81 m

c)

8.81 m

d)

12.81 m

73.

If a roller coaster track is not frictionless, which option best represents the transfer of energy?

a)

Thermal to Kinetic and Potential

b)

Kinetic to Thermal and Potential

c)

Potential to Kinetic and Thermal

74.
A box with a mass of 20 kg is moving with a velocity of 3 m/s to the right. How much kinetic energy does it have?
a)

60 J

b)

75 J

c)

90 J

d)

180 J

75.
A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops? 
a)

4.20 m

b)

52.5 m

c)

105 m

d)

158 m

76.
A spring with a spring constant of 3 N/m is compressed by 4 cm. How much potential energy is stored in the spring?
a)

0.0024 J

b)

0.024 J

c)

2.4 J

d)

24 J

77.

Which of the following forces does positive work?

a)

The force of a gravity on a block that is slowly lowered from a desk to the ground.

b)

The force of gravity on a satellite that is orbiting the earth.

c)

The force of gravity on a block that is being pushed up an incline and speeding up.

d)

The force of velocity on a free-body diagram.

78.

A frictionless pendulum swings through its full range of motion at the surface of the Earth. At the lowest point of its motion, it is moving with a velocity of 2 m/s. How high above its lowest point will it rise?

a)

0.22 m

b)

0.38 m

c)

0.41 m

d)

0.56 m

79.

A 5 kg ball is lifted 12 m above the ground. The ball:

a)

gains elastic potential energy

b)

gains gravitational potential energy

c)

gains kinetic energy

d)

gains mechanical energy

80.

Which of the following objects has the most kinetic energy?

a)

A 20 kg toddler running at 5 m/s

b)

A 50 kg toddler running at 30 m/s

c)

A 90 kg toddler running at 30 m/s

d)

A 100 kg toddler running at 5 m/s

81.
A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?
a)
2000 Joules
b)
19,600 Joules
c)
19,600 m/s
d)
31.3 m/s
82.
A roller coaster car is poised at the top of the first hill on its track. What type of energy is the car's total energy stored as?
a)

Kinetic

b)

Thermal

c)

Potential

d)

Mechanical

83.

Which of the following is true for a system consisting of a mass oscillating on the end of an ideal spring?

a)

The kinetic and potential energies are equal to each other at all times.

b)

The kinetic and potential energies are both constant.

c)

The maximum kinetic energy and maximum potential energy are equal, but occur at different times.

d)

The maximum potential energy is achieved when the mass passes through its equilibrium position.

84.

A student is asked to determine the work done on a block of wood when the block is pulled horizontally using an attached string. The student is supplied with a spring scale, a stopwatch, and a meterstick. Which of the following graphical analysis techniques will allow the student to determine the work done on the block by the string?

a)

Graphing the force as a function of time and calculating the slope

b)

Graphing the force as a function of time and calculating the area under the curve

c)

Graphing the force as a function of distance and calculating the slope

d)

Graphing the force as a function of distance and calculating the area under the curve

85.
A 1 kg mass is placed against that same spring. When released, the spring imparts all of its energy to the mass. If the surface on which the mass rests is frictionless, what is the speed that the mass will move with?
a)

6.9 cm/s

b)

7.2 cm/s

c)

12.1 cm/s

d)

1.3 m/s

86.

A rock is lifted for a certain time by a force F that is greater in magnitude than the rock's weight W. The change in kinetic energy of the rock during this time is equal to the

a)

work done by the net force (F - W)

b)

work done by F alone

c)

work done by W alone

d)

difference in the momentum of the rock before and after this time

87.

A beat is dropped from the edge of a cliff. Which of the following graphs best represents the beat's kinetic energy KE as a function of time t?

a)
b)
c)
d)
88.

An object is released from rest at a height H near and above the surface of Earth. As the object falls toward the surface, Earth’s atmosphere exerts a resistive force on the object such that it reaches a terminal velocity before it reaches the ground. Which of the following claims is true? Select two answers.

a)

The system consisting of only the object is an open system.

b)

Earth’s atmosphere does negative work on the object as it falls toward the surface.

c)

The change in the object’s kinetic energy from the instant it is released from rest, to the instant it reaches terminal velocity, is zero.

d)

The total mechanical energy of the object-Earth system remains constant at all times in which the object is in motion.

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