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Question

A particle of mass m is located outside a uniform sphere of mass M at a distance r from its centre. Find the potential energy of gravitational interaction of the particle and the sphere.
  1. 2GMmr
  2. GMm3r
  3. GMmr
  4. GMm2r

A
2GMmr
B
GMm2r
C
GMmr
D
GMm3r
Solution
Verified by Toppr

Since for a uniform solid sphere,

VG=GMr for r

and it is the work done to bring a unit mass from to distance 'r' from sphere.

For mass 'm'

VG=GMmr which is the total potential energy of the system

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