In one day a 81-kg mountain climber ascends from the 1410-m, Ask an Expert

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In one day, a 81-kg mountain climber ascends from the 1410-m level on a vertical cliff to the top at 2208 m. The next day, she descends from the top to the base of the cliff, which is at an elevation of 1215 m.

(a) What is her change in gravitational potential energy on the first day?

(b) What is her change in gravitational potential energy on the second day?

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