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A 45 g golf ball collides elastically with an identical ball at rest and stops. If the second ball's final speed is 3.0 m/s, what was the first ball's initial speed?
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A 45 g golf ball collides elastically with an identical ball

at rest and stops. If the second ball's final speed is
3.0 m/s, what was the first ball's initial speed?

User Suresh Cheemalamudi
by
7.6k points

1 Answer

2 votes
The initial speed of the first ball was 3.0 m/s. This can be determined by using the law of conservation of momentum where the total momentum of the system before the collision is equal to the total momentum of the system after the collision.
User MG Lolenstine
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8.5k points
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