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Two billiard balls of identical mass move towards each other and have an elastic collision. If...

Two billiard balls of identical mass move towards each other and have an elastic collision. If the velocities of the balls are + 20.0 cm/s and -15.0 cm/s, what is the velocity of each ball after the collision? Show all the steps.

A. v1,f= - 15.0 cm/s; v2,f= + 20.0 cm/s

B. v1,f= -10.0 cm/s; v2,f= + 20.0 cm/s

C. v1,f= +20.0 cm/s; v2,f= + 15.0 cm/s

D. v1,f= - 20.0 cm/s; v2,f= +15.0 cm/s

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Answer #1

Use conservation of linear momentum principle to find the final velocity of each ball after the collision as shown below

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