2. A 20 kg block B is suspended from a cord attached to a 40 kg cart A. Find the ratio of the acceleration 
of the block in cases (i) & (ii) shown in figure immediately after the system is released from rest. (neglect friction) 
3. The system shown adjacent is in equilibrium. Find the acceleration of the 
blocks A, B & C all ofequal masses m at the instant when 
(Assume springs to be ideal) 

(a) The spring between ceiling & A is cut. 
(b) The string (inextensible) betweenA & B is cut. 
(c) The spring between B & C is cut. 
Also find the tension in the string when the system is at rest and in the above 3 cases,
s
4. In the system shown. Find the initial acceleration ofthe wedge of mass 5M. 
The pulleys are ideal and the cords arc inextensible. 
(there is no friction anywhere).