Question

A body of mass m is moved from ground to a
height h. If force of gravity on mass of 1 kg is g
newton, find : (a) the force needed to lift the body,
(b) the work done in lifting the body and (c) the
potential energy stored in the body.
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Answer 1

Answer:

Answer: -

(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 hW=mg×h

(c) This work done W is stored in body in the form of potential energy P.E.mgh