Question

Two masses m and m’ are tied with a thread passing over a pulley. M’ is on a frictionless horizontal surface and m is hanging freely. If acceleration due to gravity is g, the acceleration of m’ in this arrangement will be

(A) g 

(B) mg/(m + m’) 

(C) mg/m’ 

(D) mg/(m-m’)

Answer 1

Correct option is (B) mg/(m + m’)

FBD of A;

Answer 2

Correct answer is (B) mg/(m + m’)