Question

Two bodies A and B each of mass m are fixed together by a mass less spring A force F acts on the mass B as shown in figure. At the instant shown, a body A has an acceleration a. what is the acceleration of B? 

(A) [(F/m) – a] 

(B) F – T 

(C) [a – (F/m)] 

(D) a

Answer 1

Correct option: (A) [(F/m) – a]

Explanation:

body A has acceleration a. 

Let acceleration of B be A 

mA = F – T 

where T = ma 

wA = F – ma 

A = {(F – ma) / m} = [(F / m) – a]