A man tries to lift a mass 200 kg with a force 100 N.
a) Is he doing work ? Explain.
b) If it is lifted to 2m in 10 sec, find his power?
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b) So the Man can’t lift the mass and hence no work is done. or W = 0
(c) Here F = Mg = 19620 N
The work done to lift the mass 2m above the ground
= W = F . d =19620 . 2m= 39240 J
We know that Power = P = W/t 39620/10 =3962 watts. (given t = 10 secs
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