TEST 2 REVIEW
PHYSICS 1401

Brooks
MULTIPLE CHOICE.
Choose the one alternative that best completes the statement or answers the question.
1) A 4

kg mass moving with speed 2 m/s, and a 2

kg mass moving with a speed of 4 m/s, are gliding over a
horizontal frictionless surface. Both objects encounter the same horizontal force, which directly opposes their
motion, and are brought to rest by it. Which statement correctly describes the situation?
A) The 4

kg mass travels twice as far as the 2

kg mass before stopping.
B) The 4

kg mass loses more kinetic energy than the 2

kg mass.
C) Both masses travel the same distance before stopping.
D) The 2

kg mass travels farther, but not necessarily twice as far.
E) The 2

kg mass travels twice as far as the 4

kg mass before stopping.
Page Ref: Sec. 5.5
A ball is released, from rest, at the left side of the loop

the

loop, at the height, h, as shown in Figure 5

3.
Figure 5

3
2) Refer to Figure 5

3. If the radius of the loop is R, what vertical height does the ball rise to, on the other side,
neglecting friction?
A) R
B) greater than 2R
C) less than R
D) 2R
Page Ref: Sec. 5.5
3) Assuming negligible friction, what spring constant would be needed by the spring in a "B

B gun" to fire a 10.
gram pellet to a height of 100 meters if the spring is initially compressed 10. cm?
A) 20. N/m
B) 200. N/m
C) 2.0
×
10
3
N/cm
D) 2.0
×
10

3
N/m
E) 20. N/cm
Page Ref: Sec. 5.5
4) If both the mass and the velocity of a ball are tripled, the kinetic energy is increased by a factor of
A) 27.
B) 81.
C) 9.
D) 18.
E) 6.
Page Ref: Sec. 5.3
5) A 4.0 kg box of fruit slides 8.0 m down a ramp, inclined at 30.° from the horizontal. If the box slides at a constant
velocity of 5.0 m/s, the work done by gravity is
A) zero.
B)
+
78. J.
C)

0.16 kJ.
D) 0.16 kJ.
E)

78. J.
Page Ref: Sec. 5.1
1
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View Full Document6) Which of the following is not a unit of work?
A) Kw

h
B) Kg

m/s
C) W

s
D) J
E) N

m
Page Ref: Sec. 5.1
7) Matthew pulls his little sister Sarah in a sled on an icy surface (assume no friction), with a force of 60.0 Newtons
at an angle of 37.0° upward from the horizontal. If he pulls her a distance of 12.0 m, the work he does is
A) 433 J
B) 0.333 kJ
C) 185 J
D) 720 J
E) 575 J
Page Ref: Sec. 5.1
Use Figure 5

2 below to answer the following question(s).
Figure 5

2
8) In Figure 5

2, showing a pendulum, at what position is the potential energy maximum?
A) A
B) B
C) C
Page Ref: Sec. 5.5
9) My 5.0 hp mower would be equivalent to an electric mower rated at what power?
A) 3.7 KW
B) 0.25 KW
C) 0.78 KW
D) 2.8 W
E) 2.8 KW
Page Ref: Sec. 5.6
10) On a plot of F vs. x, what represents the work done by the force F?
A) the area under the curve
B) the maximum F times minimum x
C) the length of the curve
D) the slope of the curve
E) the product of the maximum force times the maximum x
Page Ref: Sec. 5.1
11) Consider an ideal elastic spring. The spring constant is
A) inversely proportional to the displacement.
B) proportional to the mass attached to the spring.
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 Spring '08
 Broyles
 Force, Mass, Page Ref

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