Physics 250 Final Exam Theory – Questions Answered With
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Chapter 29- Chest and Abdominal Tr... Chapter 21 Test Ch. 22 Study Guide
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Terms in this set (21)
You need to load a crate of mass m onto the E
bed of a truck. One possibility is just to lift
the crate straight up over a height h, equal
to height of the truck's bed. The force exert
in this case is F1 and the work one in this
case is W1. The other possibility is to slight
the crate up a frictional ramp of length L. In
this case, you exert force F2 and perform
work W2. Which statement is true?
A. F1>F2 and W1>W2
B. F1=F2 and W1>W2
C. F1=F2 and W1=W2
D. F1>F2 and W1<W2
E. F1>F2 and W1=W2
Identical forces act for the same length of A
time on two different masses. The change in
momentum of the smaller mass is:
A. Equal to the change in momentum of the
larger mass
B. Larger than the change in momentum of
the larger mass
C. Smaller than the change in momentum of
the larger mass, but not zero kg m/s
D. Cannot tell without knowing masses
E. Zero kg m/s
An inelastic collision between two objects is A
characterized by the following:
A. Total momentum of the system is
conserved
B. Total energy of the system is conserved
C. Total kinetic energy of the system remains
constant
D. Both A and B are true
E. Both A and C are true
, You throw a rudder ball at a downward B
angle so that when it hits the ground, the
ball bounces off with the same speed with
which it hit the ground. How could you
increase the impulse the ground exerts on
the ball by the collision (assume you always
throw the ball at the same initial speed)?
A. Since the ball's speed does not change
as a result of the collision, the impulse
exerted on it by the ground is the same
regardless of how it is thrown
B. By throwing the ball at a steeper angle
(i.e. so its initial velocity is closer to being
directly down)
C. Since the ball's speed does not change
as a result of the collision, the impulse
exerted on it by the ground is always 0Ns
D. By throwing the ball at a shallower angle
(i.e. so its initial velocity is farther from being
directly down)
E. By throwing the ball at the same angle
with respect to the vertical but directed
above the horizontal
Two boxes of mass m and M are stacked on A
the floor of an elevator (m stacked on top of
M). If the elevator is accelerating down with
magnitude a, what is the magnitude of the
force exerted on block m by block M?
A. m (g-a)
B. (m+M) (g+a)
C. M (g-a)
D. m (g+a)
E. (m+M) (g-a)
A 2 kg object is falling downward with its A
speed increasing at a rate of 8 m/s/s. We
conjecture that there must be some other
force acting on the object in addition to the
downward pull of gravity. What can we say
about the other force?
A. It has a magnitude of 4N and points in the
upward direction
B. It has a magnitude of 36N and points in
the upward direction
C. It has a magnitude of 20N and points in
the downward direction
D. It has a magnitude of 16N and points in
the upward direction
E. It has a magnitude of 2N and points in the
downward direction
Expert Insights
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Students also studied
Chapter 29- Chest and Abdominal Tr... Chapter 21 Test Ch. 22 Study Guide
348 terms 24 terms 32 terms
anaphylacticshock Preview kenanderson2017 Preview Kendall_Dinning
Terms in this set (21)
You need to load a crate of mass m onto the E
bed of a truck. One possibility is just to lift
the crate straight up over a height h, equal
to height of the truck's bed. The force exert
in this case is F1 and the work one in this
case is W1. The other possibility is to slight
the crate up a frictional ramp of length L. In
this case, you exert force F2 and perform
work W2. Which statement is true?
A. F1>F2 and W1>W2
B. F1=F2 and W1>W2
C. F1=F2 and W1=W2
D. F1>F2 and W1<W2
E. F1>F2 and W1=W2
Identical forces act for the same length of A
time on two different masses. The change in
momentum of the smaller mass is:
A. Equal to the change in momentum of the
larger mass
B. Larger than the change in momentum of
the larger mass
C. Smaller than the change in momentum of
the larger mass, but not zero kg m/s
D. Cannot tell without knowing masses
E. Zero kg m/s
An inelastic collision between two objects is A
characterized by the following:
A. Total momentum of the system is
conserved
B. Total energy of the system is conserved
C. Total kinetic energy of the system remains
constant
D. Both A and B are true
E. Both A and C are true
, You throw a rudder ball at a downward B
angle so that when it hits the ground, the
ball bounces off with the same speed with
which it hit the ground. How could you
increase the impulse the ground exerts on
the ball by the collision (assume you always
throw the ball at the same initial speed)?
A. Since the ball's speed does not change
as a result of the collision, the impulse
exerted on it by the ground is the same
regardless of how it is thrown
B. By throwing the ball at a steeper angle
(i.e. so its initial velocity is closer to being
directly down)
C. Since the ball's speed does not change
as a result of the collision, the impulse
exerted on it by the ground is always 0Ns
D. By throwing the ball at a shallower angle
(i.e. so its initial velocity is farther from being
directly down)
E. By throwing the ball at the same angle
with respect to the vertical but directed
above the horizontal
Two boxes of mass m and M are stacked on A
the floor of an elevator (m stacked on top of
M). If the elevator is accelerating down with
magnitude a, what is the magnitude of the
force exerted on block m by block M?
A. m (g-a)
B. (m+M) (g+a)
C. M (g-a)
D. m (g+a)
E. (m+M) (g-a)
A 2 kg object is falling downward with its A
speed increasing at a rate of 8 m/s/s. We
conjecture that there must be some other
force acting on the object in addition to the
downward pull of gravity. What can we say
about the other force?
A. It has a magnitude of 4N and points in the
upward direction
B. It has a magnitude of 36N and points in
the upward direction
C. It has a magnitude of 20N and points in
the downward direction
D. It has a magnitude of 16N and points in
the upward direction
E. It has a magnitude of 2N and points in the
downward direction
