Two billiard balls of identical mass move toward each other as inActive Figure 6

Question

Two billiard balls of identical mass move toward each other as inActive Figure 6.13. Assume that the collision between them isperfectly elastic. If the initial velocities of the ballsare +28.3 cm/s and -21.5 cm/s, what is the velocity of each ballafter the collision? Assume friction and rotation areunimportant.

Find thefinal velocity of the two balls if the ball withvelocity v2i = -21.5 cm/shas a mass equal to half that of the ball with initialvelocity v1i = +28.3 cm/s.
Find thefinal velocity of the two balls if the ball withvelocity v2i = -21.5 cm/shas a mass equal to half that of the ball with initialvelocity v1i = +28.3 cm/s.

Explanation / Answer

the mass is not provided. Can you put it into a form without mass as a variable?

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