Answers

2016-03-12T01:41:01+05:30
Given -
Mass = 5.2 kg
Height = 15 m
g = 10 m/s-2
To find - Work done
Solution -
Potential Energy = mgh
= 5.2×-10×15
= -780 joules

She had done work against the force of gravity because she displaces herself from top to down
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  • Brainly User
2016-03-12T05:13:31+05:30
Solutions 

Weight= 5.2 kg
Height = 15 m

To solve the problem we use the formula 
g = 10 m/s-2

Calculations

Potential Energy = mgh
= 5.2 × -10 x 15
= -780 joules

simplified -780 
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