A mass m is at a distance a from one end of a uniform rod of length l and mass M. Find the gravitational force on the mass due to tke rod.

Answer

A, D

Explanation

`dF=(G(dM)m)/(x^2)=(G((M)/(l)*dx)m)/(x^2)`

`:.F =int_(x=a)^(x=(a+l)) dF =(GMm)/(a(l+a)`