A body of mass m is in vertical motion under the influence of gravity then
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A
In case of vertical motion under gravity, when the body falls, force of gravity (a conservative force) is in the direction of motion of so K.E. increases but when the body is projected upward, force of gravity is opposite to motion so K.E. of body decreases. If kinetic energy of a body increases the work is taken as positive and vice versa.
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