Really confused here, the question as follows is not out of atextbook. It requir

Question

Really confused here, the question as follows is not out of atextbook.
It requires 25,000 ft*lbf of work to raise a body vertically250 ft in the gravitational field near the earth, where the localaccelelration of gravity is 31 ft/s^2. Determine the mass (lbm) of the body. Please help is needed here Really confused here, the question as follows is not out of atextbook.
It requires 25,000 ft*lbf of work to raise a body vertically250 ft in the gravitational field near the earth, where the localaccelelration of gravity is 31 ft/s^2. Determine the mass (lbm) of the body. Please help is needed here

Explanation / Answer

given,    workdone=25000lbf.ft     and h=250ft ,     a=31ft/sec^2 as we know that workdone=F.h                                         =m.a.h                              25000 =m.*31*250          mass ofthe body is,                                m=3.225lbm

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