A man of mass 75 kg runs up a staircase consisting of 30 steps. Each step is 20 cm high.
The man takes a time of 7.0 s to run from the bottom of the staircase to the top.
What is the average rate of increase of gravitational potential energy of the man?
1 )
64 W
2 )
450 W
630 W
4 )
4400 W
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