Question

A dense sphere of mass M is placed at the centre of a circular of radius R. Find the work done when a particle of mass m is brought from A to B along a circle as shown in Fig.

• A. Zero
• B.
• C. −
• D. $\frac { 2 \mathrm { GMm } } { \mathrm { R } }$

Answer 1

Answer: (A)

Zero

Answer 2

W = ∆PE = 0