Question

A 20 kg object is hangs at the end of a 3.0 m horizontal rod of mass 5.0 kg that is hinged to a pole as shown in figure below. To support the hanging object, a cable is tied at an angle 550 at the middle of the rod. If the cable breaks, find the magnitude and direction of angular acceleration of this system.

Answer 1

$\varepsilon=2.0~\frac {rad}{s^2},$

$\theta=-30°.$