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Which describes the difference between a bowling ball sitting in the rack waiting to be used and the bowling ball knocking pins down?

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Mashenkaid
1. Bowling ball sitting in the rack:
kinetic energy = 0, because the ball is not in motion - we have only potential energy in this case
2. Bowling ball knocking pins down:
at the moment of knocking kinetic energy is increased, while the potential energy is decreased

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