1. The problem statement, all variables and given/known data Q. In the figure shown, find out the value of θ [ assume string to be tight ] 2. Relevant equations 3. The attempt at a solution If the pulley was not moving ,then we could have equated the component of velocities of the two blocks along the string . But,since the pulley is moving,something extra needs to be done .Not sure what . I would be grateful if somebody could help me with the problem .