Grade 9Mechanics
an object of mass m is pulled uupwards to a height h , whats the work done???
2 Answers
vikas askiitian expert
workdone = F.d = Fdcos@
here in this case @ = 0 , d = h , F = mg (weight of body )
so , work = (mg)(H) = mgH
Vikas TU
work done = Force * displacement
here force acting on this object of mass m is gravitational force that is mg and the displacement taken is h
Hence work done = mg * h
= mgh
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