Question

can someone help me solve this exercise? the way i have been trying to do it does not give me the right answer.

asked by
@mariagabriellav1 • about 2 years ago • PhysicsElastic Collisions

Two billiard balls of equal mass m collide elas-tically as shown in the diagram. Initially the 13 ball has speed v and the 9 ball is at rest. After the collision the 13 ball has speed 1/2 v and the 9 ball has speed vf . What is vf ?

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