Question: In one day, a 75-kg mountain climber ascends from the1500-m level on a vertical cliff to the top at 2400 m. The next day, she

In one day, a 75-kg mountain climber ascends from the1500-m level on a vertical cliff to the top at 2400 m. The next day, she descends from the top to the base of the cliff, which is at an elevation of 1350 m. What is her change in gravitational potential energy?
(a) On the first day and
(b) On the second day?

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