A billiards ball moving at speed v collides elastically with an identical, stationary ball. Kinetic energy...

Question

Question

A billiards ball moving at speed v collides elastically with an identical, stationary ball.

Kinetic energy is conserved in the collision. After the collision, the first ball heads off at

an angle theta relative to its original direction and at a speed v/2

. What is the speed of the

second ball?

Answer 1

Answer #1

Answer 2

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