First slide

Gravitational potential and potential energy

Question

A shell of mass M and radius R has a point mass m placed at a distance r from its centre. The gravitational potential energy U (r) vs r will be

Moderate

A
B
C
D

Solution

Gravitational P.E. = m × gravitational potential
U = mV So the graph of U will be same as that of V for a spherical shell.

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