Understanding Elastic and Inelastic Collisions

This picture is an example of ____________

• Elastic Collision

• Inelastic collision

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NGSS.HS-PS2-2

Collisions can be ____________or ___________.

• fast or slow

• far or near

• elastic or inelastic

• none of the above

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NGSS.HS-PS2-2

Sally runs and jumps off of a diving board and lands on a tube (she stays in the tube).  The collision between Sally and the tube is

• Elastic

• Explosive

• Inelastic

• Completely absurd

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NGSS.HS-PS2-2

As you are walking along the sidewalk you step on a piece of gum that sticks to your shoe.  This is an example of an _____ collision.

• Elastic

• Inelastic

Due to friction, a purely _____ collision is impossible outside of a laboratory setting.

• Elastic

• Inelastic

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NGSS.HS-PS2-3

If a momentum car is moving at 2 kg m/s and crashes into a stationary momentum car, how much momentum would transfer over to the stationary car?

• all of the momentum

• half of the momentum

• a little bit of the momentum

• zero momentum

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NGSS.HS-PS2-2

In any collision (crash) the ______ is ALWAYS constant

• total momentum

• total speed

• total Velocity

• Energy

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NGSS.HS-PS2-2

Describe the process of calculating momentum after a collision.

• Ignore conservation of momentum

• Calculate initial momentum of each object, apply conservation of momentum, and solve for final momentum of objects.

• Calculate final momentum first

• Use kinetic energy instead of momentum

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NGSS.HS-PS2-2

Why is it important to consider momentum conservation in collisions?

• To increase the total energy of the system

• To decrease the total momentum of the system

• To ignore the laws of physics

• To understand how the total momentum of a system is conserved before and after a collision.

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NGSS.HS-PS2-2

Why is it necessary to analyze the impulse and momentum of objects involved in collisions?

• To admire the beauty of physics

• To confuse students

• To make the calculations more complicated

• To understand the forces, changes in momentum, and predict collision outcomes.

Tags

NGSS.HS-PS2-2