A body of mass m is moved from the ground to a height h. If the force of gravity on mass of 1kg is g newton Find: a.)the force needed to lift the body b.)the work done in lifting the body c.)the potential energy stored in the body
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(a) When a body of mass m at A on ground is raised above ground through height h at B force is applied. This force applied = weight of body Force on mass m = F = mg Where ‘g’ is the force of gravity on a mass of 1 kg.
(b) Work done in lifting the body = Force × displacement h W = mg × h
(c) This work done W is stored in body in the form of Potential energy P.E. mgh
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the formula of force is F= ma
F=m(1)
i.e F=m
work done =FSCOS TITA
W=(m)(s)
W=ms
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