the tub of a washing machine is initially at rest. when the spin cycle begins, it begins to rotate. In the first 2.80 s, it makes 3 complete revolutions. what is its final angular velocity?

Answer 1

Assume the angular acceleration (alpha) is a constant then it is (3 rev*2pi rad/rev)/2.8sec = 6.73 rad/sec². Know that angular velocity (w)= alpha*t= 6.73*2.8= 18.8 rad/sec