Qu121 - Two equal weights
A pulley arrangement consisting of a fixed pulley A, a fixed double pulley B, and a free pulley C is attached to two equal masses D and E as shown in the diagram. The pulleys are light and frictionless, and the ropes are light and inextensible. The pulleys are very small in comparison to their separation. The system is initially held in a position shown. The angle rope CA makes to vertical is θ, and the angle ropes CB make to the vertical is φ. The system is released. What is the angle θ when the system is in equilibrium?
