A 60 kg man runs up a staircase in 12 seconds while a 50 kg man runs of the same staircase in 11 second the ratio of the rate of doing their work is
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Explanation:
The rate of work done= Total work done /time take.
For 60kg persons,
total work done=Change in potential energy
=mgH
=60gH
Rate of work done=60gH/12=5gH
for a 50kg person,
total work done=Change in potential energy
=mgH
=50gH
rate of work done=50gH/11
therefore the ratio of the rate of work done=5gH*11/50gH
=11/10
=1.1
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