Physics

We have a scenario where a ball of mass (ball A) is attached to a frictionless string of length and swings down to collide elastically with a stationary ball of mass (ball B). After the collision, both balls move in the same direction along the surface.

 

We need to find the ratio of the final velocities of the two balls.

According to Momentum and Kinetic Energy Conservation, we have

 

We can solve:

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