If a ball hits a another ball with the same mass at rest in a perfectly elastic collision, what would most likely happen?
The two balls would swap velocities.
The first ball would keep moving but at a slower speed. The second ball would move faster.
The first ball would bounce backwards, and the second ball would move forwards.
PLEASE HELP HAVE TO SUBMIT IN 20minutes!!

The two balls swap velocities in perfect elastic collision.

Explanation:

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the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.