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PHYSICS- TEST 2 (CHAPTERS 6-7)
QUESTIONS WITH DETAILED VERIFIED
ANSWERS
Which has the greater momentum when moving?
A) a container ship
B) a bullet
C) either of these depending on speed Ans: C
Which of the following has the largest momentum relative to Earth's
surface?
A) a tightrope walker crossing Niagara Falls
B) a pickup truck speeding along a highway
C) a Mack truck parked in a parking lot
D) the Science building on campus
E) a mouse running across your room Ans: B
A freight train rolls along a track with considerable momentum. If it rolls
at the same speed but
has twice as much mass, its momentum is
A) zero. B) twice.
C) four times as much. D) unchanged. Ans: B
A same-size iron ball and wooden ball are dropped simultaneously from a
tower and reach the
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ground at the same time. The iron ball has a greater
A) speed.
B) acceleration.
C) momentum.
D) all of the above
E) none of the above Ans: C
The speed of a 4-kg ball with a momentum of 12 kg m/s is
A) 3 m/s.
B) 4 m/s.
C) 12 m/s.
D) 48 m/s.
E) none of the above Ans: A
The mass of a ball moving at 3 m/s with a momentum of 48 kg m/s is
A) 4 kg.
B) 12 kg.
C) 16 kg.
D) 144 kg.
E) none of these Ans: C
A motorcycle of mass 100 kilograms slowly rolls off the edge of a cliff and
falls for three seconds
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before reaching the bottom of a gully. Its momentum upon hitting the
ground is
A) 1,000 kg m/s.
B) 2,000 kg m/s.
C) 3,000 kg m/s.
D) 4,000 kg m/s.
E) 9,000 kg m/. Ans: C
When Peter tosses an egg against a sagging sheet, the egg doesn't break
due to
A) reduced impulse. B) reduced momentum.
C) both of these D) neither of these Ans: D
Padded dashboards in cars are safer in an accident than non-padded ones
because passengers
hitting the dashboard encounter
A) lengthened time of contact. B) shorter time of contact.
C) decreased impulse. D) increased momentum. Ans: A
A car traveling along the highway brakes to a stop over a certain
distance. More braking force is
required if the car has
A) more mass.
B) more momentum.
C) less stopping distance.
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D) all of the above
E) none of the above Ans: D
It is correct to say that impulse is equal to
A) momentum. B) a corresponding change in momentum.
C) force multiplied by the distance it acts. D) velocity multiplied by time.
Ans: B
To catch a fast-moving ball, you extend your hand forward before contact
with the ball and let it
ride backward in the direction of the ball's motion. Doing this reduces the
force of contact on
your hand principally because the
A) force of contact is reduced.
B) relative velocity is less.
C) time of contact is increased.
D) time of contact is decreased.
E) none of the above Ans: C
Which produces more force: driving into a very massive concrete wall
with no "give," or having
a head-on collision with an identical car moving toward you at the same
speed?
A) car B) wall
C) both the same D) need more information Ans: C
PHYSICS- TEST 2 (CHAPTERS 6-7)
QUESTIONS WITH DETAILED VERIFIED
ANSWERS
Which has the greater momentum when moving?
A) a container ship
B) a bullet
C) either of these depending on speed Ans: C
Which of the following has the largest momentum relative to Earth's
surface?
A) a tightrope walker crossing Niagara Falls
B) a pickup truck speeding along a highway
C) a Mack truck parked in a parking lot
D) the Science building on campus
E) a mouse running across your room Ans: B
A freight train rolls along a track with considerable momentum. If it rolls
at the same speed but
has twice as much mass, its momentum is
A) zero. B) twice.
C) four times as much. D) unchanged. Ans: B
A same-size iron ball and wooden ball are dropped simultaneously from a
tower and reach the
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ground at the same time. The iron ball has a greater
A) speed.
B) acceleration.
C) momentum.
D) all of the above
E) none of the above Ans: C
The speed of a 4-kg ball with a momentum of 12 kg m/s is
A) 3 m/s.
B) 4 m/s.
C) 12 m/s.
D) 48 m/s.
E) none of the above Ans: A
The mass of a ball moving at 3 m/s with a momentum of 48 kg m/s is
A) 4 kg.
B) 12 kg.
C) 16 kg.
D) 144 kg.
E) none of these Ans: C
A motorcycle of mass 100 kilograms slowly rolls off the edge of a cliff and
falls for three seconds
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before reaching the bottom of a gully. Its momentum upon hitting the
ground is
A) 1,000 kg m/s.
B) 2,000 kg m/s.
C) 3,000 kg m/s.
D) 4,000 kg m/s.
E) 9,000 kg m/. Ans: C
When Peter tosses an egg against a sagging sheet, the egg doesn't break
due to
A) reduced impulse. B) reduced momentum.
C) both of these D) neither of these Ans: D
Padded dashboards in cars are safer in an accident than non-padded ones
because passengers
hitting the dashboard encounter
A) lengthened time of contact. B) shorter time of contact.
C) decreased impulse. D) increased momentum. Ans: A
A car traveling along the highway brakes to a stop over a certain
distance. More braking force is
required if the car has
A) more mass.
B) more momentum.
C) less stopping distance.
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D) all of the above
E) none of the above Ans: D
It is correct to say that impulse is equal to
A) momentum. B) a corresponding change in momentum.
C) force multiplied by the distance it acts. D) velocity multiplied by time.
Ans: B
To catch a fast-moving ball, you extend your hand forward before contact
with the ball and let it
ride backward in the direction of the ball's motion. Doing this reduces the
force of contact on
your hand principally because the
A) force of contact is reduced.
B) relative velocity is less.
C) time of contact is increased.
D) time of contact is decreased.
E) none of the above Ans: C
Which produces more force: driving into a very massive concrete wall
with no "give," or having
a head-on collision with an identical car moving toward you at the same
speed?
A) car B) wall
C) both the same D) need more information Ans: C
