The 5-kg slender bar is released from rest in the horizontal position shown. Determine the...

The 5-kg slender bar is released from rest in the horizontal position shown. Determine the magnitude of its angular velocity when it has fallen to the vertical position.

Strategy: Draw the free-body diagram of the bar when it has fallen through an arbitrary angle θ and apply the equation of angular motion to determine the bar’s angular acceleration as a function of θ). Then use the chain rule to write the angular acceleration as