- #1

- 21

- 1

I have seen a famous lecture in which to find gravitational potential energy, on finding the work done in bringing a mass m from infinity to a point R , ∫F.dr is solved as ∫F*dr which actually should be a ∫-F*dr because applied force in that case is against gravitational attraction which must give cosθ as -1.

The same confusion exists in case of finding out the electrostatic potential due to a positive charge.

Kindly help me understand this.