Seema takes 1 minute to carry a bag weighing 20 kg. to a height of 12 m. How much power has she used ?
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Explanation:
given
mass (m)= 20 kg
height (h)= 12 m
time taken (t)= 1m =60s
gravitational force (g)= 9.8
power= w/t
= mgh/t
=( 20×9.8×12)/60
= 39.2J
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