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Momentum, Impulse, and Collisions
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College Physics Reasoning and Relationships

Physics & Astronomy

Quiz 7 :
Momentum, Impulse, and Collisions

Quiz 7 :
Momentum, Impulse, and Collisions

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A valid unit for momentum is which of the following?
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Answer:

Answer:

C

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A 0.12-kg ball is moving at 6.0 m/s when it is hit by a bat, causing it to reverse direction and have a speed of 8.0 m/s. What is the magnitude of the change in the momentum of the ball?
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Answer:

Answer:

C

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The dimensional equivalence of the quantity "momentum" in terms of the fundamental quantities (mass, length, time) is:
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Answer:

A

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Alex throws a 0.43-kg rubber ball down onto the floor. The ball's speed just before impact is 6.5 m/s, and just after is 5.5 m/s. What is the magnitude of the change in the ball's momentum?
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Jerome pitches a baseball of mass 0.15 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to Jerome with a return speed of 60 m/s. What is the magnitude of change in the ball's momentum?
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Object 1 has twice the mass of Object 2. Both objects have the same kinetic energy. Which of the following statements is true?
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Two masses m1 and m2, with m1 > m2, have momenta with equal magnitudes. How do their kinetic energies compare?
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If the momentum of an object is tripled, its kinetic energy will change by what factor?
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The kinetic energy of an object is quadrupled. Its momentum will change by what factor?
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Object 1 has twice the mass of Object 2. Each of the objects has the same magnitude of momentum. Which of the following statements is true?
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A rock is moving with speed v. If the mass of the rock were tripled and the speed were reduced to v/3, which of the following statements would be true?
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In an automobile collision, how does an airbag lessen the blow to the passenger? Assume as a result of the collision, the passenger stops.
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The dimensional equivalent of the quantity impulse in terms of the fundamental quantities (mass, length, time) is which of the following?
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A 75-kg swimmer dives horizontally off a 500-kg raft. The diver's speed immediately after leaving the raft is 1.6 m/s. A micro-sensor system attached to the edge of the raft measures the time interval during which the diver applies an impulse to the raft just prior to leaving the raft surface. If the time interval is read as 0.20 s, what is the magnitude of the average horizontal force by diver on the raft?
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The impulse experienced by a body is equivalent to its change in:
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Alex throws a 0.15-kg rubber ball down onto the floor. The ball's speed just before impact is 6.5 m/s and just after is 3.5 m/s. If the ball is in contact with the floor for 0.050 s, what is the magnitude of the average force applied by the floor on the ball?
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A crane drops a 0.40-kg steel ball onto a steel plate. The ball's speeds just before impact and after are 4.5 m/s and 4.2 m/s, respectively. If the ball is in contact with the plate for 0.030 s, what is the magnitude of the average force that the ball exerts on the plate during impact?
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Lonnie pitches a baseball of mass 0.15 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to Lonnie with a return speed of 60 m/s. If the bat is in contact with the ball for 0.050 s, what is the impulse experienced by the ball?
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If a glass of water is on a table with a piece of paper under it, it is relatively easy to pull the paper out without disturbing the glass very much if the pull is done very quickly. This is because with a quick pull:
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A car wash nozzle directs a steady stream of water at 1.5 kg/s, with a speed of 20 m/s, against a car window. What force does the water exert on the glass? Assume the water does not splash back.
Multiple Choice
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