A pendulum in the shape of a rod which has mass M = 2.78 kg and length L = 120 cm is pivoted at point O and initially held in the horizontal position as shown in the figure. The rotational inertia of the rod about the center of mass is ICM = ML². (Take g = 9.8 m/s²). What is the angular acceleration of the rod when it makes an angle = 50° with the vertical? Now suppose that the rod is kept in this position and then released (released from rest at angle ). Determine the angular speed of the rod when it is completely vertical.

A pendulum in the shape of a rod which has mass M = 2.78 kg and length L = 120 cm is pivoted at point O and initially held in the horizontal position as shown in the figure. The rotational inertia of the rod about the center of mass is ICM = ML². (Take g = 9.8 m/s²). What is the angular acceleration of the rod when it makes an angle = 50° with the vertical? Now suppose that the rod is kept in this position and then released (released from rest at angle ). Determine the angular speed of the rod when it is completely vertical.