1. The problem statement, all variables and given/known data Two blocks A and B , each of same mass m are attached by a thin inextensible string through an ideal pulley . Initially block B is held in position as shown in figure . Now the block B is released . Block A will slide to right and hit the pulley in time t(a) . Block B will swing and hit the surface in time t(b). Assume the surface as frictionless. Then prove that , t(a)<t(b) 3. The attempt at a solution Let the tension in the string be T . L=1/2(T/m)[t(a)^2] How to get the time t(b) .