Physics Samples: Q2 Exam
Per ___ Date ___________
1. According to your reference table, Approximate
Coefficents of Friction, what is the minimum horizontal
force needed to start a 300. kilogram steel block on a steel
table in motion?
(A) 5.70 N
(C) 1710 N
(B) 7.40 N
(D) 2220 N
Name ____________________
5. The diagram below represents a car resting on a hill.
2. A box decelerates as it
moves to the right along a
horizontal surface, as
shown in the diagram at
the right.
Which vector best represents the force of friction on the
box?
Which vector best represents the weight of the car?
(A) A
(C) C
(B) B
(D) D
6. In the diagram below, the weight of a box on a plane
inclined at 30.º is represented by the vector W.
(C)
(A)
(D)
(B)
3. The diagram below shows a granite block being slid at
constant speed across a horizontal concrete floor by a
force parallel to the floor.
What is the magnitude of the component of the weight (W
) that acts parallel to the incline?
(A) W
(C) 0.87 W
(B) 0.50 W
(D) 1.5 W
7. Base your answer to the following question on the
diagram below which shows a cart held motionless by an
external force F on a frictionless incline.
Which pair of quantities could be used to determine the
coefficient of friction for the granite on the concrete?
(A) mass and speed of the block
(B) mass and normal force on the block
(C) frictional force and speed of the block
(D) frictional force and normal force on the block
4. Four cannonballs, each with mass M and initial velocity V,
are fired from a cannon at different angles relative to the
Earth. Neglecting air friction, which angular direction of
the cannon produces the greatest projectile height?
(A) 90º
(C) 45º
(B) 70º
(D) 20º
Compared to the magnitude of the external force F
required to hold the cart at point C on the frictionless
surface, the magnitude of the external force F required to
hold the cart at point C, if friction were present, is
(A) less
(C) the same
(B) greater
8. A 1-kilogram object rests on a horizontal table top. The
force that the table top exerts on the object is
(A) 1 N
(C) 0 N
(B) 2 N
(D) 9.8 N
Q2_SampsA
9. A 1.0-kilogram block is placed on each of four frictionless
planes inclined at different angles. On which inclined plane
will the acceleration of the block be greatest?
(A)
13. The diagram below shows a golf ball being struck by a club.
The ball leaves the club with a speed of 40. meters per
second at an angle of 60.° with the horizontal.
(B)
(C)
(D)
10. A projectile is fired at an angle of 53º to the horizontal
with a speed of 80. meters per second. What is the vertical
component of the project initial velocity?
(A) 130 m/s
(C) 64 m/s
(B) 100 m/s
(D) 48 m/s
11. A 100.-newton force acts on point P, as shown in the
diagram below.
The magnitude of the vertical component of this force is
approximately
(A) 30. N
(C) 71 N
(B) 50. N
(D) 87 N
12. According to your table, Approximate Coefficents of
Friction, which road surface would offer the greatest
traction for rubber tires?
(A) dry concrete
(C) dry asphalt
(B) wet concrete
(D) wet asphalt
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If the ball strikes the ground 7.1 seconds later, how far
from the golfer does the ball land? [Assume level ground
and neglect air resistance.]
(A) 35 m
(C) 140 m
(B) 71 m
(D) 280 m
14. A projectile is fired from a gun near the surface of Earth.
The initial velocity of the projectile has a vertical
component of 98 meters per second and a horizontal
component of 49 meters per second. How long will it take
the projectile to reach the highest point in its path?
(A) 5.0 s
(C) 20. s
(B) 10. s
(D) 100. s
15. Jill is pulling a 200. Newton sled through the snow at
constant velocity using a horizontal force of 10. Newtons.
What is the kinetic coefficient of friction of the sled on the
snow?
(A) 0.02
(C) 0.20
(B) 0.05
(D) 20
16. The diagram below represents a box shown sliding down
an inclined plane. Toward which point will the force of
friction on the box be directed?
(A) 1
(B) 2
(C) 3
(D) 4
17. Jim wishes to push a 100. N wood crate across a wood
floor. According to your table, Approximate Coefficents of
Friction, what is the minimum horizontal force that would
be required to start the crate moving?
(A) 30. N
(C) 72 N
(B) 42 N
(D) 100 N
18. The diagram below shows the muzzle of a cannon located
50. meters above the ground. When the cannon is fired, a
ball leaves the muzzle with an initial horizontal speed of
250. meters per second. [Neglect air resistance.]
22. Base your answer to the following question on the
diagram below which represents a 3.0-kilogram mass
being moved at a constant speed by a force of 6.0
Newtons.
The magnitude of the force of friction acting on the mass is
(A) 0 N
(C) 3 N
(B) 1.8 N
(D) 6 N
Which action would most likely increase the time of flight
of a ball fired by the cannon?
(A) pointing the muzzle of the cannon toward the ground
(B) moving the cannon closer to the edge of the cliff
(C) positioning the cannon higher above the ground
(D) giving the ball a greater initial horizontal velocity
19. The table below lists the coefficients of kinetic friction for
four materials sliding over steel.
23. A box initially at rest on a level floor is being acted upon by
a variable horizontal force, as shown in the diagram at the
right. Compared to the force required to start the box
moving, the force required to keep it moving at constant
speed is
(A) less
(B) greater
(C) the same
Base your answers to questions 24 and 25 on the information
and diagram below.
A child kicks a ball with an initial velocity of 8.5
meters per second at an angle of 35º with the
horizontal, as shown. The ball has an initial vertical
velocity of 4.9 meters per second and a total time of
flight of 1.0 second. [Neglect air resistance.]
A 10.-kilogram block of each of these materials is pulled
horizontally across a steel floor at constant velocity. Which
block requires the smallest applied force to keep it moving
at constant velocity?
(A) aluminum
(C) copper
(B) brass
(D) steel
20. In order to keep an object weighing 20 Newtons moving at
constant speed along a horizontal surface, a force of 10
Newtons is required. The force of friction between the
surface and the object is
(A) 0 N
(C) 20 N
(B) 10 N
(D) 30 N
21. An artillery shell is fired at an angle to the horizontal. Its
initial velocity has a vertical component of 150 meters per
second and a horizontal component of 260 meters per
second. What is the magnitude of the initial velocity of the
shell?
(C) 3.0 × 102 m/s
(A) 9.0 × l04 m/s
2
(B) 4.1 × 10 m/s
(D) 1.1 × 102 m/s
Q2_SampsA
24. The horizontal component of the ball’s initial velocity is
approximately
(A) 3.6 m/s
(C) 4.9 m/s
(B) 7.0 m/s
(D) 13 m/s
25. The maximum height reached by the ball is approximately
(A) 1.2 m
(C) 4.9 m
(B) 2.5 m
(D) 8.5 m
26. The diagram below shows a student applying a 10.-newton force to slide a piece of wood at constant speed across a horizontal surface.
After the wood is cut in half, one piece is placed on top of the other, as shown.
What is the magnitude of the force, F, required to slide the stacked wood at constant speed across the surface?
(A) 40 N
(B) 20 N
(C) 10 N
(D) 5.0 N
27. Base your answer to the following question on the information and diagram below.
A student standing on a knoll throws a snowball horizontally 4.5 meters above the level ground toward a smokestack 15
meters away. The snowball hits the smokestack 0.65 second after being released. [Neglect air resistance.]
At the instant the snowball is released, the horizontal component of its velocity is approximately
(A) 6.9 m/s
(B) 9.8 m/s
(C) 17 m/s
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(D) 23 m/s
Base your answers to questions 28 through 30 on on the diagram and information below.
A machine launches a tennis ball at an angle of 45° with the horizontal, as shown. The ball has an initial vertical velocity of 9.0
meters per second and an initial horizontal velocity of 9.0 meters per second. The ball reaches its maximum height 0.92 second after
its launch. [Neglect air resistance and assume the ball lands at the same height above the ground from which it was launched.]
28. The total horizontal distance traveled by the tennis ball during the entire time it is in the air is approximately
(A) 23 m
(B) 17 m
(C) 8.3 m
(D) 4.1 m
29. The speed at which the launcher fires tennis balls is constant, but the angle between the launcher and the horizontal can be varied. As the
angle is decreased from 45° to 30.°, the range of the tennis balls
(A) decreases
(B) increases
(C) remains the same
30. The speed of the tennis ball as it leaves the launcher is approximately
(A) 4.5 m/s
(B) 8.3 m/s
(C) 13 m/s
Base your answers to questions 31 and 32 on the information
below.
A ball is projected vertically upward from the
surface of the Earth with an initial speed of +49 meters
per second. The ball reaches its maximum height in 5.0
seconds. (Disregard air resistance.)
31. What is the total displacement of the ball from the time it
is thrown until it returns to the point from which it was
thrown?
(A) 248 m
(C) 49 m
(B) 9.8 m
(D) 0 m
32. What is the maximum height reached by the ball?
(A) 24.5 m
(C) 122.5 m
(B) 49.0 m
(D) 245 m
33. A 0.2-kilogram red ball is thrown horizontally at a speed of
4 meters per second from a height of 3 meters. A 0.4kilogram green ball is thrown horizontally from the same
height at a speed of 8 meters per second. Compared to the
time it takes the red ball to reach the ground, the time it
takes the green ball to reach the ground is
(A) one-half as great
(C) the same
(B) twice as great
(D) four times as great
Q2_SampsA
(D) 18 m/s
Base your answers to questions 34 and 35 on the information
below.
Projectile A is launched horizontally at a speed of
20. meters per second from the top of a cliff and
strikes a level surface below, 3.0 seconds later.
Projectile B is launched horizontally from the same
location at a speed of 30. meters per second.
34. The time it takes projectile B to reach the level surface is
(A) 4.5 s
(C) 3.0 s
(B) 2.0 s
(D) 10. s
35. Approximately how high is the cliff?
(A) 29 m
(C) 60. m
(B) 44 m
(D) 104 m
36. A golf ball is hit with an initial velocity of 15 meters per
second at an angle of 35 degrees above the horizontal.
What is the vertical component of the golf ball’s initial
velocity?
(A) 8.6 m/s
(C) 12 m/s
(B) 9.8 m/s
(D) 15 m/s
37. The diagram below shows a student throwing a baseball
horizontally at 25 meters per second from a cliff 45 meters
above the level ground.
41. A ball is projected horizontally to the right from a height of
50. meters, as shown in the diagram below.
Which diagram best represents the position of the ball at
1.0-second intervals? [Neglect air resistance.]
Approximately how far from the base of the cliff does the
ball hit the ground? [Neglect air resistance.]
(A) 45 m
(C) 140 m
(B) 75 m
(D) 230 m
Base your answers to questions 38 and 39 on the diagram below
which shows a ball projected horizontally with an initial velocity
of 20. meters per second east, off a cliff 100. meters high.
[Neglect air resistance.]
(A)
(C)
(B)
(D)
38. How many seconds does the ball take to reach the ground?
(A) 4.5 s
(C) 9.8 s
(B) 20. s
(D) 2.0 s
39. During the flight of the ball, what is the direction of its
acceleration?
(A) downward
(C) westward
(B) upward
(D) eastward
40. What is the period of orbit of a communications satellite in
geosynchronous orbit about Earth?
(A) 1 year
(C) 12 hours
(B) 24 hours
(D) 60 minutes
Q2_SampsA
42. A ball thrown vertically upward reaches a maximum height
of 30. meters above the surface of Earth. At its maximum
height, the speed of the ball is
(A) 0.0 m/s
(C) 3.1 m/s
(B) 9.8 m/s
(D) 24 m/s
43. Base your answer to the following question on the
information below.
An outfielder throws a baseball to the first
baseman at a speed of 19.6 meters per second
and an angle of 30.° above the horizontal.
48. Projectiles are fired from different angles with the same
initial speed of 14 meters per second. The graph below
shows the range of the projectiles as a function of the
original angle of inclination to the ground, neglecting air
resistance.
Which pair represents the initial horizontal velocity (vx)
and initial vertical velocity (vy) of the baseball?
(A) vx = 17.0 m/s, vy = 9.80 m/s
(B) vx = 9.80 m/s, vy = 17.0 m/s
(C) vx = 19.4 m/s, vy = 5.90 m/s
(D) vx = 19.6 m/s, vy = 19.6 m/s
44. Base your answer to the following question on the
information and diagram below.
A cannon elevated at an angle of 35º to the
horizontal fires a cannonball, which travels the
path shown in the diagram below.
[Neglect air resistance and assume the ball lands
at the same height above the ground from which
it was launched.]
The graph shows that the range of the projectiles is
(A) the same for all angles
(B) the same for angles of 20.º and 80.º
(C) greatest for an angle of 45º
(D) greatest for an angle of 90.º
49. Base your answer to the following question on the
information below.
If the ball lands 7.0 × 102 meters from the cannon 10.
seconds after it was fired, what is the horizontal
component of its initial velocity?
(A) 70. m/s
(C) 35 m/s
(B) 49 m/s
(D) 7.0 m/s
45. A ball is thrown at an angle of 38° to the horizontal. What
happens to the magnitude of the ball’s vertical
acceleration during the total time interval that the ball is in
the air?
(A) It decreases, then increases.
(B) It decreases, then remains the same.
(C) It increases, then decreases.
(D) It remains the same.
46. A vector makes an angle, ‡, with the horizontal. The
horizontal and vertical components of the vector will be
equal in magnitude if angle ‡ is
(A) 30°
(C) 60°
(B) 45°
(D) 90°
47. A basketball player jumped straight up to grab a rebound.
If she was in the air for 0.80 second, how high did she
jump?
(A) 0.50 m
(C) 1.2 m
(B) 0.78 m
(D) 3.1 m
Q2_SampsA
A toy projectile is fired from the ground
vertically upward with an initial velocity of +29
meters per second. The projectile arrives at its
maximum altitude in 3.0 seconds.
[Neglect air resistance.]
The greatest height the projectile reaches is approximately
(A) 23 m
(C) 87 m
(B) 44 m
(D) 260 m
50. A ball is thrown horizontally from the top of a building with
an initial velocity of 15 meters per second. At the same
instant, a second ball is dropped from the top of the
building. The two balls have the same
(A) path as they fall
(B) final velocity as they reach the ground
(C) initial horizontal velocity
(D) initial vertical velocity
51. Compared to the mass of an object at the surface of the
Earth, the mass of the object a distance of two Earth radii
from the center of the Earth is
(A) the same
(C) one-half as great
(B) twice as great
(D) one-fourth as great
52. A mass of 10 kilograms is revolving at a linear speed of 5
meters per second in a circle with a radius of 10 meters.
The centripetal force acting on the mass is
(A) 5 N
(C) 20 N
(B) 10 N.
(D) 25 N
Base your answers to questions 53 through 55 on the
information and diagram below.
58. Four different balls are thrown horizontally off the top of
four cliffs. In which diagram does the ball have the
shortest time of flight?
A ball is thrown horizontally with an initial velocity
of 20.0 meters per second from the top of a tower 60.0
meters high.
(A)
(C)
(B)
(D)
53. What is the approximate total time required for the ball to
reach the ground? [Neglect air resistance.]
(A) 12.2 s
(C) 3.00 s
(B) 2.04 s
(D) 3.50 s
54. What is the initial vertical velocity of the ball?
(A) 0 m/s
(C) 20.0 m/s
(B) 9.81 m/s
(D) 60.0 m/s
55. What is the horizontal velocity of the ball just before it
reaches the ground? [Neglect air resistance.]
(A) 9.81 m/s
(C) 34.3 m/s
(B) 20.0 m/s
(D) 68.6 m/s
56. A 2-kilogram block is dropped from the roof of a tall
building at the same time a 6-kilogram ball is thrown
horizontally from the same height. Which statement best
describes the motion of the block and the motion of the
ball? [Neglect air resistance.]
(A) The 2-kg block hits the ground first because it has no
horizontal velocity.
(B) The 6-kg ball hits the ground first because it has more
mass.
(C) The 6-kg ball hits the ground first because it is round.
(D) The block and the ball hit the ground at the same time
because they have the same vertical acceleration.
57. An object weighs 200. Newtons at a distance of
100. kilometers above the center of a small uniform
planet. How much will the object weigh 200. kilometers
above the planet's center?
(A) 400. N
(C) 50.0 N
(B) 100. N
(D) 25.0 N
Q2_SampsA
59. Gravitational force F exists between point objects A and B
separated by distance R. If the mass of A is doubled and
distance R is tripled, what is the new gravitational force
between A and B?
(A) 2F
9
(B) 2F
3
(C) 3F
2
(D) 9F
2
60. Base your answer to the following question on the
information below.
A car traveling at a speed of 13 meters per
second accelerates uniformly to a speed of 25
meters per second in 5.0 seconds.
A truck traveling at a constant speed covers the same total
distance as the car in the same 5.0-second time interval.
Determine the speed of the truck.
Base your answers to questions 61 through 63 on the following
information. In the diagram below, a 10.-kilogram sphere, A, is
projected horizontally with a velocity of 30. meters per second
due east from a height of 20. meters above level ground. At the
same instant, a 20.-kilogram sphere, B, is projected horizontally
with a velocity of 10. meters per second due west from a height
of 80. meters above level ground. [Neglect air friction.]
61. Compared to the vertical acceleration of sphere A, the
vertical acceleration of sphere B is
(A) the same
(C) one-half as great
(B) twice as great
(D) four times as great
62. Initially, the spheres are separated by a horizontal distance
of 100. meters. What is the horizontal separation of the
spheres at the end of 1.5 seconds?
(A) 15 m
(C) 40. m
(B) 30 m
(D) 45 m
63. The magnitude of the horizontal acceleration of sphere A is
(C) 9.8 m/s2
(A) 0.0 m/s2
2
(B) 2.0 m/s
(D) 15 m/s2
64. Base your answer to the following question on the
information and diagram below.
The diagram shows a student seated on a
rotating circular platform, holding a 2.0-kilogram
block with a spring scale. The block is 1.2 meters
from the center of the platform. The block has a
constant speed of 8.0 meters per second.
[Frictional forces on the block are negligible.]
Which statement best describes the block’s movement as
the platform rotates?
(A) Its velocity is directed tangent to the circular path,
with an inward acceleration.
(B) Its velocity is directed tangent to the circular path,
with an outward acceleration.
(C) Its velocity is directed perpendicular to the circular
path, with an inward acceleration.
(D) Its velocity is directed perpendicular to the circular
path, with an outward acceleration.
65. Base your answer to the following question on the
information and diagram below.
A 1200-kilogram car traveling at a constant
speed of 9.0 meters per second turns at an
intersection. The car follows a horizontal circular
path with a radius of 25 meters to point P.
The magnitude of the centripetal force acting on the car as
it travels around the circular path is approximately
(C) 3.9 × 103 N
(A) 1.1 × 104 N
4
(B) 1.2 × 10 N
(D) 4.3 × 102 N
Q2_SampsA
Base your answers to questions 66 and 67 on the information
and diagram below.
A roller coaster cart starts from rest and accelerates,
due to gravity, down a track. The cart starts at a height
that enables it to complete a loop in the track. [Neglect
friction.]
69. Base your answer to the following question on the
information and diagram below.
A 1.00 × 103 -kilogram car is driven clockwise
around a flat circular track of radius 25.0 meters.
The speed of the car is a constant 5.00 meters
per second.
66. Which diagram best represents the path followed by an
object that falls off the cart when the cart is at point D?
(A)
(B)
(C)
(D)
67. The magnitude of the centripetal force keeping the cart in
circular motion would be greatest at point
(A) A
(C) C
(B) B
(D) D
Which factor, when doubled, would produce the greatest
change in the centripetal force acting on the car?
(A) mass of the car
(C) velocity of the car
(B) radius of the track
(D) weight of the car
70. Base your answer to the following question on the
diagram below which represents a ball of mass M attached
to a string. The ball moves at a constant speed around a
flat horizontal circle of radius R.
68. Base your answer to the following question on the
diagram below which represents a mass of 10.0 kilograms
traveling at constant speed of 4. meters per second in a
horizontal circular path about point D.
If the string is shortened while the speed of the ball
remains the same, the centripetal acceleration will
(A) decrease
(C) remain the same
(B) increase
Which quantity would increase if the radius increased?
(A) period
(C) mass
(B) tangential velocity
(D) centripetal acceleration
Q2_SampsA
Base your answers to questions 71 through 74 on the diagram
below which represents a 2.0-kilogram mass moving in a circular
path on the end of a string 0.50 meter long. The mass moves in a
horizontal plane at a constant speed of 4.0 meters per second.
71. The speed of the mass is changed to 2.0 meters per
second. Compared to the centripetal acceleration of the
mass when moving at 4.0 meters per second, its
centripetal acceleration when moving at 2.0 meters per
second would be
(A) half as great
(C) one-fourth as great
(B) twice as great
(D) four times great
72. The force exerted on the mass by the string is
(A) 8 N
(C) 32 N
(B) 16 N
(D) 64 N
73. The centripetal force acting on the mass is directed toward
point
(A) A
(C) C
(B) B
(D) D
74. In the position shown in the diagram, the momentum of
the mass is directed toward point
(A) A
(C) C
(B) B
(D) D
Q2_SampsA
Base your answers to questions 75 through 79 on the diagram
below which represents a 5.0-kilogram object revolving around a
circular track in a horizontal plane at a constant speed. The
radius of the track is 20. meters and the centripetal force on the
object is 4.0 × 102 Newtons.
75. The object's centripetal acceleration is
(A) 0.012 m/s²
(C) 80. m/s²
(B) 20. m/s²
(D) 1.0 × 102 m/s2
76. In the position shown, the object's centripetal acceleration
is directed toward point
(A) A
(C) C
(B) B
(D) D
77. In the position shown, the object's velocity is directed
toward point
(A) A
(C) C
(B) B
(D) D
78. The object's speed is
(A) 20. m/s
(B) 40. m/s
(C) 60. m/s
(D) 80. m/s
79. If the radius of the track is increased, the centripetal force
necessary to keep the object revolving at the same speed
would
(A) decrease
(C) remain the same
(B) increase
80. An object on the end of a string
rotates clockwise in a circle as
shown in the diagram below.
Base your answers to questions 81 through 83 on the diagram
below which shows a 2.0-kilogram model airplane attached to a
wire. The airplane is flying clockwise in a horizontal circle of
radius 20. meters at 30. meters per second.
If the string breaks when the object is at point X, which
arrow below best represents the path of the object after
the string has broken?
(A)
(C)
(B)
(D)
81. If the wire breaks when the airplane is at the position
shown, the airplane will move toward point
(A) A
(C) C
(B) B
(D) D
82. The centripetal force acting on the airplane at the position
shown is directed toward point
(A) A
(C) C
(B) B
(D) D
83. What is the magnitude of the centripetal acceleration of
the airplane?
(C) 45 m/s2
(A) 0 m/s2
2
(B) 1.5 m/s
(D) 90. m/s2
Q2_SampsA
Answer Key
NYS Regents [Jun 25, 2008]
1.
D
30.
C
59.
A
2.
D
31.
D
60. 19 m/s.
3.
D
32.
C
61.
A
4.
A
33.
C
62.
C
5.
B
34.
C
63.
A
6.
B
35.
B
64.
A
7.
A
36.
A
65.
C
8.
D
37.
B
66.
A
9.
D
38.
A
67.
A
10.
C
39.
A
68.
A
11.
B
40.
B
69.
C
12.
A
41.
D
70.
B
13.
C
42.
A
71.
C
14.
B
43.
A
72.
D
15.
B
44.
A
73.
A
16.
B
45.
D
74.
D
17.
B
46.
B
75.
C
18.
C
47.
B
76.
D
19.
C
48.
C
77.
A
20.
B
49.
B
78.
B
21.
C
50.
D
79.
A
22.
D
51.
A
80.
A
23.
A
52.
D
81.
B
24.
C
53.
D
82.
C
25.
A
54.
A
83.
C
26.
C
55.
B
27.
D
56.
D
28.
B
57.
C
29.
A
58.
A
Q2_SampsA