Question

A body of mass m is placed on the surface of earth.lt is taken from earth surface to a height h=3R. The change in gravitational potential energy of the body is

Answer 1

Answer:

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✖️A body mass m us placed on a surface of earth is taken from earth surface to height of h=3r .Then change in gravitational potential energy is??✖️

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Vi = -GMm/R

Vf = GMm/R+H

=GMm/R+3r

=GMm/4R

Delta V= Vf-Vi = GMm/R (1-1/4)

=g (r^2m/r)×3/4

= -3/4 mgR

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