A drawbridge of length ℓ = 30 ft and weight W = 600 lb is released in the position shown a...

A drawbridge of length ℓ = 30 ft and weight W = 600 lb is released in the position shown and freely pivots clockwise until it strikes the right end of the moat. If the COR for the collision between the bridge and the ground is e = 0.45 and if the contact point between the bridge and the ground is effectively ℓ away from the bridge’s pivot point, determine the angle to which the bridge rebounds after the collision. Neglect any possible source of friction.

Figure P8.87