Force is required to lift a body from the ground to a height h and work is measured as - Physics - Work Energy And Power

Question

Force is required to lift a body from the ground to a height h and
work is measured
as the product of force and magnitude of displacement
a) Name the energy possessed by the body at maximum height Write an
equation for it
b) A man of mass 60 kg carries a stone of mass 20 kg to the top of
a multi-storeyed building of height 50m Calculate the total energy
spent by him? (9 8m/s2)

Shobhit Mittal · Accepted Answer

a)
 the energy possesed is gravitational potential enrgy 
eqn for PE for mass m at height h U=mghb)
 total mass M=60+20=80 kg  h=50m
work done by the man =mgh=80*9
8*50=39200JRegards