A weight lifter lifted a load of 200 kgf to a
height of 2.5 m in 5 s. Calculate : (i) the work
done, and (ii) the power developed by him. Take
g = 10 N kg-1
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Explanation:
(i) the work done = 2000x2.5 = 5000j
(ii) the power developed = 5000j/5s = 1000 watts
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