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Mini-Quiz: Derivation of a Simple Collision

by Ron Kurtus (29 July 2013)

Take this Mini-Quiz to check your understanding of the lesson material.

1. Why must the objects be perfectly stiff in this derivation?

Otherwise they would break apart when they collide

So that no kinetic energy is lost to deformation when they collide

So that they will bounce higher

2. Why is the total kinetic energy before the collision just E1 = mv12/2?

Because MV12/2 is unknown

So that the equations are simpler

Because V1 = 0

3. What equation do you use to determine v2 as a function of v1?

v1 = v2 + kV2

v12 = v22 + k2V22

P2 = mv2 + MV2

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.

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