Momentum: Elastic and Inelastic Collisions

What is the law of conservation of momentum?

• Total momentum of a closed system increases with time

• Momentum decreases as external forces act on a closed system

• Momentum is not conserved in a closed system

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

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9-12.9

Define elastic collision.

• In an elastic collision, kinetic energy is converted to potential energy.

• In an elastic collision, only momentum is conserved.

• In an elastic collision, kinetic energy is lost.

• In an elastic collision, both momentum and kinetic energy are conserved.

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9-12.9

Explain the concept of inelastic collision.

• Kinetic energy is conserved and the objects move apart after the collision.

• The total momentum of the system is conserved.

• Kinetic energy is not conserved and the objects stick together after the collision.

• The objects involved in the collision bounce off each other with no loss of kinetic energy.

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9-12.9

9-12.9.a

In an isolated system, what happens to the total momentum before and after a collision?

• Total momentum increases

• Total momentum remains constant

• Total momentum is conserved

• Total momentum decreases

Tags

NGSS.HS-PS2-2

What is the equation for calculating the momentum of an object?

• p = mv^2

• p = mv

• p = m^2v

• p = ma

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NGSS.HS-PS2-2

How does the total kinetic energy change in an elastic collision?

• Remains constant

• Increases

• Becomes zero

• Decreases

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9-12.9.a

Give an example of a real-life elastic collision.

• Ping pong

• Bowling

• Billiards

• Soccer

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NGSS.HS-PS2-2

Give an example of a real-life inelastic collision.

• Two billiard balls colliding and bouncing off each other

• A car crash is an example of a real-life inelastic collision.

• A bouncing ball

• A rocket launching into space

Tags

NGSS.HS-PS2-2

What are the key differences between elastic and inelastic collisions?

• Momentum conservation

• Potential energy conservation

• Kinetic energy conservation

• No difference between the two

Tags

NGSS.HS-PS2-2

A baseball hits a bat and both move in opposite directions after the collision. What type of collision is it?

• Elastic

• Inelastic

Tags

NGSS.HS-PS2-2