Download A) kg × m s2 B) kg × m 2 C) kg × m s2 D) kg2 × m s2 1. A force of 1

1. A force of 1 newton is equivalent to 1
A) kg × m
s2
B) kg × m
A)
B)
C)
D)
2
2
C) kg × m
s2
2
D) kg 2 × m
s2
2. Which two quantities can be expressed using the same
units?
A)
B)
C)
D)
energy and force
impulse and force
momentum and energy
impulse and momentum
3. The fundamental unit of mass in the mks system is the
A) milligram
C) kilogram
B) gram
D) decigram
4. The mass of a paper clip is approximately
A) l × l06 kg
C) 1 ×10 –3 kg
B) l × l03 kg
D) 1 ×10 –6 kg
5. The approximate height of a 12-ounce can of root beer is
A) 1.3 × 10 –3 m
C) 1.3 × 10 0 m
B) 1.3 × 10 –1 m
D) 1.3 × 10 1 m
6. The weight of an apple is closest to
A) 10 –2 N
C) 10 2 N
B) 10 0 N
D) 10 4 N
7. In a 4.0-kilometer race, a runner completes the first
kilometer in 5.9 minutes, the second kilometer in 6.2
minutes, the third kilometer in 6.3 minutes, and the final
kilometer in 6.0 minutes. The average speed of the
runner for the race is approximately
A) 0.16 km/min
C) 12 km/min
B) 0.33 km/min
D) 24 km/min
8. A force of 10 Newtons is required to move an object at a
constant speed of 5 meters per second. The power used is
A) 0.5 W B) 2 W
9. Oil drips at 0.4-second intervals from a car that has an oil
leak. Which pattern best represents the spacing of oil
drops as the car accelerates uniformly from rest?
C) 5 W
D) 50 W
10. Which graph best represents the relationship between the acceleration of an object falling freely near the
surface of Earth and the time that it falls?
A)
B)
C)
D)
Base your answers to questions 11 through 14 on the
graph below, which shows the velocity of a
1,500-kilogram car during a 20-second-time interval..
11. No unbalanced force is acting on the car during time
interval
A) BC
B) CD
C) EF
D) FG
12. The acceleration of the car during time interval AB is
A) 0.40 m./sec. 2
C) 10 m./sec. 2
B) 2.5 m./sec. 2
D) 40 m./sec. 2
13. During time interval CD, the average velocity of the car
is
A) 7.5 m./sec.
C) 15 m./sec.
B) 17.5 m./sec.
D) 35 m./sec.
14. The impulse applied to the car during time interval AB
is
A)
C)
N-sec.
N-sec.
B)
D)
N-sec.
N-sec.
Base your answers to questions 15 through 20 on the graph below which represents the relationship
between speed and time for an object in motion along a straight line.
15. What is the acceleration of the object during the time interval t = 3 seconds to t = 5 seconds?
A) 5.0 m/sec 2
B) 7.5 m/sec 2
C) 12.5 m/sec 2
D) 17.5 m/sec 2
16. What is the average speed of the object during the time interval t = 6 seconds to t = 8 seconds'?
A) 7.5 m/sec
B) 10 m/sec
C) 15 m/sec
D) 17.5 m/sec
17. What is the total distance traveled by the object during the first 3 seconds?
A) 15 m
B) 20 m
C) 25 m
D) 30 m
18. During which interval is the object's acceleration the greatest?
A) AB
B) CD
C) DE
D) EF
19. During the interval t = 8 seconds to t = 10 seconds, the speed of the object is
A) zero
C) decreasing
B) increasing
D) constant, but not zero
20. What is the maximum speed reached by the object during the 10 seconds of travel?
A) 10 m/sec
B) 25 m/sec
C) 150 m/sec
D) 250 m/sec
Base your answers to questions 21 through 25 on the
diagram below which represents carts A and B being
pushed apart by a spring which exerts an average force
of 50. Newtons for a period of 0.20 second. [Assume
friction-less conditions.]
26. If the force vector shown in the diagram above is
resolved into two components, these two components
could best be represented by which diagram below?
21. What is the magnitude of the impulse applied by the
spring on cart A?
A) 5.0 N-sec
C) 50. N-sec
B) twice as great
D) four times as great
23. Compared to the velocity of cart B at the end of the
0.20-second interaction, the velocity of cart A is
A) one-half as great
C) the same
B)
C)
D)
B) 10. N-sec
D) 100 N-sec
22. Compared to the magnitude of the impulse acting on
cart A, the magnitude of the impulse acting on cart B is
A) one-half as great
C) the same
A)
27. Which is a scalar quantity?
A) acceleration
C) speed
B) momentum
D) displacement
28. The diagram below represents a constant force F acting
on a box located on a frictionless horizontal surface.
B) twice as great
D) four times as great
24. What is the average acceleration of cart B during the
0.20-second interaction?
A) 0 m/s 2
C) 25 m/s 2
B) 10. m/s 2
D) 50. m/s 2
25. Compared to the total momentum of the carts before the
spring is released, the total momentum of the carts after
the spring is released is
A) one-half as great
C) the same
B) twice as great
D) four times as great
As the angle between the force and the horizontal
increases, the acceleration of the box will
A) decrease
C) remain the same
B) increase
29. The handle of a lawn roller is held at 45° from the
31. The diagram below shows a block on a horizontal
horizontal. A force, F, of 28.0 Newtons is applied to the
frictionless surface. A 100.- newton force acts on the
handle as the roller is pushed across a level lawn, as
block at an angle of 30.° above the horizontal.
shown in the diagram below.
What is the magnitude of force F if it establishes
equilibrium?
What is the magnitude of the force moving the roller
forward?
A) 7.00 N
C) 19.8 N
B) 14.0 N
D) 39.0 N
30. The vector below represents the resultant of two forces
acting concurrently on an object at point P.
Which pair of vectors best represents two concurrent
forces that combine to produce this resultant force
vector?
A) 50.0 N
C) 100. N
B) 86.6 N
D) 187 N
32. What is the magnitude of the force needed to keep a
60.-newton rubber block moving across level, dry
asphalt in a straight line at a constant speed of 2.0
meters per second?
A) 40. N B) 51 N C) 60. N D) 120 N
33. In the diagram below, surface B of the wooden block
has the same texture as surface A, but twice the area of
surface A
A)
B)
If force F is required to slide the block at constant
speed across the table on surface A, approximately what
force is required to slide the block at constant speed
across the table on surface B?
C)
A) F
D)
B) 2F
C) F
D) 4F
34. An object falls freely near Earth’s surface. Which graph
best represents the relationship between the object’s
kinetic energy and its time of fall
A)
B)
C)
D)
35. A car travels at constant speed v up a hill from point A
to point B, as shown in the diagram below.
39. A box is pushed to the right with a varying horizontal
force. The graph below represents the relationship
between the applied force and the distance the box
moves.
As the car travels from A to B, its gravitational potential
energy
A) increases and its kinetic energy decreases
B) increases and its kinetic energy remains the
same
C) remains the same and its kinetic energy decreases
D) remains the same and its kinetic energy remains
the same
36. The diagram above represents a spring hanging
vertically that stretches 0.075 meter when a 5.0- newton
block is attached. The spring-block system is at rest in
the position shown.
The value of the spring constant is
A) 38 N/m
C) 130 N/m
B) 67 N/m
D) 650 N/m
37. A 0.50-kilogram object moves in a horizontal circular
path with a radius of 0.25 meter at a constant speed of
4.0 meters per second. What is the magnitude of the
object’s acceleration?
A) 8.0 m/s 2
C) 32 m/s 2
B) 16 m/s 2
D) 64 m/s 2
38. A spring has a spring constant of 120 newtons per
meter. How much potential energy is stored in the
spring as it is stretched 0.20 meter?
A) 2.4 J B) 4.8 J
C) 12 J
D) 24 J
What is the total work done in moving the box 6.0
meters?
A) 9.0 J
B) 18 J
C) 27 J
D) 36 J
Base your answers to questions 40 through 44 on the
diagram below which represents a simple pendulum
with a 2.0-kilogram bob and a length of 10. meters. The
pendulum is released from rest at position 1 and swings
without friction through position 4. At position 3, its
lowest point, the speed of the bob is 6.0 meters per
second.
46. In raising an object vertically at a constant speed of 2.0
meters per second, 10. watts of power is developed.
The weight of the object is
A) 5.0 N B) 20. N C) 40. N D) 50. N
47. In the diagram below, 400. joules of work is done
raising a 72-newton weight a vertical distance of 5.0
meters.
40. At which position does the bob have its maximum
kinetic energy?
A) 1
B) 2
C) 3
D) 4
41. What is the potential energy of the bob at position 1 in
relation to position 3?
A) 18 J
B) 36 J
C) 72 J
D) 180 J
42. At position 4, the centripetal force on the bob is
directed toward point
A) A
B) B
C) C
D) D
43. What is the centripetal acceleration of the bob at
position 3?
A) 1.8 m/s 2
C) 7.2 m/s 2
B) 3.6 m/s 2
D) 36 m/s 2
44. Compared to the sum of the kinetic and potential
energies of the bob at position 1, the sum of the kinetic
and potential energies of the bob at position 3
A) less
C) the same
B) greater
45. A person does 100 joules of work in pulling back the
string of a bow. What will be the initial speed of a
0.5-kilogram arrow when it is fired from the bow?
A) 20 m/s
C) 200 m/s
B) 50 m/s
D) 400 m/s
How much work is done to overcome friction as the
weight is raised?
A) 40. J B) 360 J C) 400. J D) 760 J
48. If the critical angle for a substance is 44º, the index of
refraction of the substance is equal to
A) 1.0
B) 0.69
C) 1.4
D) 0.023
49. Base your answer to the following question on The
diagram below shows a student throwing a baseball
horizontally at 25 meters per second from a cliff 45
meters above the level ground.
Approximately how far from the base of the cliff does
the ball hit the ground? [Neglect air resistance.]
A) 45 m B) 75 m C) 140 m D) 230 m
Base your answers to questions 50 and 51 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.]
50. 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.
51. The reading on the spring scale is approximately
A) 20. N B) 53 N C) 110 N D) 130 N
Base your answers to questions 52 and 53 on the
information and diagram below
A golf ball leaves a golf club with an initial velocity
of 40.0 meters per second at an angle of 40º with the
horizontal.
52. What is the vertical component of the golf ball’s initial
velocity?
A) 25.7 m/s
C) 40.0 m/s
B) 30.6 m/s
D) 61.3 m/s
53. What is the total horizontal distance traveled by the golf
ball during the first 2.50 seconds of its flight?
A) 100. m
C) 64.3 m
B) 76.6 m
D) 40.0 m
Answer Key
take home april
1.
A
37.
D
2.
D
38.
A
3.
C
39.
C
4.
C
40.
C
5.
B
41.
B
6.
B
42.
A
7.
A
43.
B
8.
D
44.
C
9.
B
45.
A
10.
D
46.
A
11.
A
47.
A
12.
B
48.
C
13.
B
49.
B
14.
D
50.
A
15.
B
51.
C
16.
D
52.
A
17.
C
53.
B
18.
A
19.
C
20.
B
21.
B
22.
C
23.
B
24.
C
25.
C
26.
D
27.
C
28.
A
29.
C
30.
D
31.
B
32.
A
33.
A
34.
D
35.
B
36.
B