Posted by **zianna** on Friday, August 17, 2012 at 10:14am.

In one day, a 75-kg mountain climber ascends from the 1500-m level

on a vertical cli to the top at 2400 m. The next day, she descends

from the top to the base of the cli, 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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