Question

A particle of mass 10kg is kept on the surface of a uniform sphere of mass 100kg and radius 10cm.Find the work to be done against the gravitational force between them to take the particle far away from the sphere.

Answer 1

6.67×10−9J

6.67×10−10J

13.34×10−10J

3.33×10−10J

Answer :

4

Solution :

W=GMmr=6.67×10−11×100×10/0.1=6.67×10−7J