Assertion (a) : A particle of mass $m$ dropped into a hole made along the diameter of the earth from one end…
Assertion (a) : A particle of mass $m$ dropped into a hole made along the diameter of the earth from one end to the other and possess simple harmonic motion.Reason (R) : Gravitational force between any two particles is inversely proportional to the square of the distance between them.
Both (A) and (R) are true and (R) is the correct explanation of $(A)$
Both (A) and (R) are true but (R) is not the correct explanation of (A)