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Physics, 13.03.2020 23:26 Ilovesnoopy69

A 75-kg roofer climbs a vertical 7.0-m ladder to the flat roof of a house. He then walks 12 m on the roof, climbs down another vertical 7.0-m ladder, and finally walks on the ground back to his starting point.
Part A
How much work is done on him by gravity as he climbs up?
Express your answer using two significant figures.
Part B
How much work is done on him by gravity as he climbs down?
Express your answer using two significant figures.
Part C
How much work is done on him by gravity as he walks on the roof?
Express your answer using two significant figures.
Part D
How much work is done on him by gravity as he walks on the ground?
Express your answer using two significant figures.
Part E
What is the total work done on him by gravity during this round trip?
Express your answer using two significant figures.

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