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OpenStudy (anonymous):

A roller-coaster starts at a height of 30m above the ground. At the bottom of a loop. the roller-coaster is at a height of 10m. Approximately, how much gravitational potential energy is lost by a 75-kg rider?

OpenStudy (anonymous):

Probably better to move it into Physics instead of Biology

OpenStudy (anonymous):

But change gravitational potential energy is mg(h2-h1), where h2 is 10 and h1 is 30 m

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