Question

In the diagram shown, no friction at any contact surface.

Initially, the spring has no deformation.

What will be the maximum deformation in the spring ?Consider all the strings to be sufficiency large. Consider the spring constant to be K.

(A) 4F / 3K 

(B) 8F / 3K 

(C) F / 3K 

(D) none

Answer 1

Correct option: (B) 8F / 3K

Explanation:

At the time of maximum separation, blocks come in rest in C-frame.

In C-frame,

ΔT = 0

W _peseudo =W_S + W_1F + W_2F = ΔT = 0 ....(i)

Work done by pseudo frame in C-frame is zero.

From the concept of centre of mass

Putting the values in equation (2)