Momentum & Collisions Review

Which statement is correct regarding momentum between objects?

• The smaller object will have less momentum if the velocities are the same.

• The larger object will have less momentum if the velocities are equal.

• The larger object will have less momentum if its velocity is greater.

• The object with greater velocity will have less momentum if the masses are equal.

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NGSS.HS-PS2-2

A skateboarder rides up a hill at 5 m/s and then rolls down the hill at 9 m/s. The momentum of the skateboarder is _.

• remains the same throughout.

• equal to zero throughout.

• greater riding up the hill.

• greater rolling down the hill.

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NGSS.HS-PS2-2

A small _____ applied over a long time interval can produce a large change in an object’s momentum.

• mass

• force

• velocity

• momentum

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NGSS.HS-PS2-1

Which of Newton’s laws does conservation of momentum follow?

• Universal Gravitation

• Newton’s 1st Law

• Newton’s 3rd Law

• Newton’s 2nd Law

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NGSS.HS-PS2-2

Two ice skaters are facing one another at rest. They push off one another and their final momenta are

• Opposite directions and different magnitudes

• Equal in magnitude and direction

• Equal direction but different magnitudes

• Equal in magnitude and opposite in direction

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NGSS.HS-PS2-2

Which of the following describes the law of conservation of momentum?

• The total momentum of an isolated, closed-system is conserved.

• Every object in an isolated, closed-system maintains a constant momentum

• The total momentum of an isolated, closed-system is zero.

• The total momentum of an open or closed-system is conserved.

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NGSS.HS-PS2-2

Two objects move towards each other. They collide and separate. Some kinetic energy was lost in the collision. Which of the following is true?

• The collision was elastic and total momentum was not conserved.

• The collision was not elastic and total momentum was not conserved.

• The collision was not elastic and total momentum was conserved.

• The collision was elastic and total momentum was conserved.

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NGSS.HS-PS2-2

NGSS.HS-PS3-1

Which of the following best describes a perfectly inelastic collision?

• Total momentum is never conserved.

• Total momentum is sometimes conserved.

• Kinetic energy is always conserved.

• Kinetic energy is never conserved.

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NGSS.HS-PS2-2

During an explosion, which of the following statements is true?

• Two objects begin separately and then join moving at the same velocity. Total momentum is conserved and kinetic energy decreases.

• Two objects begin together and then separate at their own velocities; total momentum before is equal to the sum of each individual object’s momenta.

• Two objects begin together and then separate at their own velocities; total momentum is not conserved during an explosion.

• Two objects begin separately and then join moving at the same velocity. Total momentum and kinetic energy are conserved.

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NGSS.HS-PS2-2

Determine the momentum of 1000-kg car moving southward at 20 m/s.

• 20000 N

• 20000 Joules

• 20000 Kg * m/s south

• 10000 kg * m/s south

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NGSS.HS-PS2-2