9709 P42 - Jun 2021 - Q3
4088
A ring of mass 0.3 kg is threaded on a horizontal rough rod. The coefficient of friction between the ring and the rod is 0.8. A force of magnitude 8 N acts on the ring. This force acts at an angle of 10° above the horizontal in the vertical plane containing the rod.
Find the time taken for the ring to move, from rest, 0.6 m along the rod.
