Question

1) A thin rod of length 0.64 m and mass 150 g is suspended freely from one end. It is pulled to one side and then allowed to swing like a pendulum, passing through its lowest position with angular speed 1.46 rad/s. Neglecting friction and air resistance, find (a) the rod's kinetic energy at its lowest position and (b) how far above that position the center of mass rises.

2) A wheel, starting from rest, rotates with a constant angular acceleration of 4.80 rad/s². During a certain 6.00 s interval, it turns through 93.6 rad. (a) How long had the wheel been turning before the start of the 6.00 s interval? (b) What was the angular velocity of the wheel at the start of the 6.00 s interval?

Answer 1