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Homework answers / question archive / American University in Cairo  PHYSICS 1011 Chapter 7—Kinetic Energy and Work MULTIPLE CHOICE 1)A constant force of 12 N in the positive x direction acts on a 4
American University in Cairo  PHYSICS 1011
Chapter 7—Kinetic Energy and Work
MULTIPLE CHOICE
1)A constant force of 12 N in the positive x direction acts on a 4.0kg object as it moves from the origin to the point m. How much work is done by the given force during this displacement?
a. +60 J
b. +84 J
c. +72 J
d. +48 J
e. +57 J
a. +0.29 kJ
b. ?0.29 kJ
c. +30 J
a. +2.0 J
b. +20 J
c. ?2.0 J
d. ?20 J
e. +40 J
5.4 N) as shown in the figure. The magnitude of the force of friction acting on the block between A and B is 1.2 N and points A and B are 0.5 m apart. If the kinetic energies of the block at A and B are 4.0 J and
5.6 J, respectively, how much work is done on the block by the force P between A and B?
a. +45 J
b. ?45 J
c. +30 J
d. ?30 J
e. +75 J
b. +10 J
c. +30 J
e. +40 J
e. +18 J
a. +12 J
b. +28 J
c. +40 J
d. +42 J
a. ?1.2 J
b. +1.2 J
c. +2.4 J
d. ?2.4 J
e. +3.6 J
a. +36 J
b. +28 J
c. +32 J
d. +24 J
e. +60 J
a. ?3.3 J
b. +1.3 J
c. +3.3 J
d. ?1.3 J
e. +4.6 J
e. +64 J
a. 0.85 m/s 


b. 0.89 m/s 


c. 0.77 m/s 


d. 0.64 m/s 


e. 0.52 m/s


a. 8.3 J 


b. 6.4 J 


c. 7.0 J 


d. 7.7 J 


e. 3.9 J


a. ?2.5 J
b. ?1.4 J
c. ?3.0 J
d. ?1.9 J
e. ?14 J
= 600 N/m) which has its other end fixed. The speed of the block when the spring is extended 20 cm is equal to 3.0 m/s. What is the maximum speed of this block as it oscillates?
a. 106?
b. 102?
c. 110?
d. 113?
e. 97?
a. ?13
b. +13
c. +37
d. ?37
e. 73
a. ?76 


b. ?62 


c. ?90 


d. ?47 


e. ?170


a. 6.6
b. 4.6
c. 8.3
d. 9.8
e. 7.6
a. 2.1
b. 2.5
c. 2.3
d. 2.7
e. 3.1
a. 118?
b. 107?
c. 112?
d. 103?
e. 77?
a. 7.8
b. 6.4
c. 3.6
d. 5.0
e. 4.8
a. +96
b. ?96
c. +51
d. ?51
e. ?35
a. ?35
b. +35
c. ?20 


d. +20 


e. +40


a. +19
b. +23
c. ?19
d. ?23
e. +30
c. +mgh.
d. ?2mgh.
e. +2mgh.
c. +?kmgd.
d. ?2?kmgd.
e. +2?kmgd.
a. .
b.
.
c. KA = KB. d.
.
e. .
a. .
b.
.
c. vA = vB. d.
.
e. .
orbit. The work they do is W and . At the position shown
b. 150 J.
c. 1 500 J.
d. 4 700 J.
e. 46 000 J.
a. 2.00 


b. 10.7 


c. 14.8 


d. 15.0 


e. 21.1


.
The most likely physical situation it describes is
a. 2.9 cm 


b. 5.0 cm 


c. 5.8 cm 


d. 7.5 cm 


e. 10.0 cm


a.
b.
c.
d.
e. No answer given above is correct.
b. ?24
c. 14
d. ?14
e. 28
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