Conceptual Momentum Quiz Practice

What is the definition of momentum?

• The product of an object's mass and velocity

• The speed of an object

• The distance traveled by an object

• The force exerted by an object

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Which of the following statements is true about the conservation of momentum?

• The total momentum of a closed system is not affected by external forces.

• The total momentum of a closed system increases if external forces act on it.

• The total momentum of a closed system decreases if external forces act on it.

• The total momentum of a closed system remains constant if no external forces act on it.

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In an elastic collision, what happens to the total kinetic energy of the system?

• Decreases

• Conserved

• Increases

• Remains constant

In an inelastic collision, what happens to the 'physical appearance' of the object (or objects)?

• They are deformed and/or broken

• They remain in their original shapes

• They explode

Which of the following is an example of an elastic collision?

• A basketball bouncing off the ground and losing some of its energy.

• A car crashing into a wall and coming to a complete stop.

• Two billiard balls colliding and bouncing off each other without any loss of kinetic energy.

• Two billiard balls colliding and sticking together.

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Which of the following is an example of an inelastic CAR collision?

• Two objects passing through each other after colliding

• Two objects bouncing off each other after colliding

• Two objects collide and both are damaged due to the deformation of the cars after colliding

• Two objects exploding into multiple pieces after colliding

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What is the relationship between momentum and force?

• Momentum is inversely proportional to force.

• Momentum is equal to force.

• Momentum has no relationship with force.

• Momentum is directly proportional to force.

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Which of the following statements is true about momentum and forces?

• Momentum and forces are unrelated concepts.

• Momentum can change the direction of a force.

• Forces can change the momentum of an object.

• Forces have no effect on the momentum of an object.

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If the momentum of a moving object decreases, what are possibilities as to why?

• The object slowed down

• The object 'lost' mass somehow

• The object could have slowed down and/or decreased in its mass

• No object can decrease its momentum

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A PROJECTILE is launched upward into the air (like our 2D motion unit). The PROJECTILE travels up, stops, and falls back to the ground. Which of the following is TRUE?

• The projectile's momentum decreased on its path upward

• The projectile's momentum was ZERO at the very top of the trajectory (due to being 'stopped' for an instant

• The projectile's momentum increased on its path downward toward the Earth

• All answers are TRUE

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