Class 11 NEET Physics Gravitation Questions

Gravitational potential energy on earth's surface =−

GMm

R

, where M and R are the mass and radius of the earth respectively, mis the mass of the body and G is the universal gravitational constant.
Gravitational potential energy at a height h=3R
=−

GMm

R+h

=−

GMm

R+3R

=−

GMm

4R

Change in potential energy
=−

GMm

4R

−(−

GMm

R

)
=−

GMm

4R

+

GMm

R

=

3

4

GMm

R

=

3

4

mgR