A wheel is delivering 400 W of power at 250 rpm. How much torque is needed to turn the wheel? Don't forget there are 2 pi radians in a rotation! Write your answer to three significant digits and don't forget your units!

A wheel rotating with a constant angular acceleration turns through 15 revolutions during a 2 s time interval. Its angular velocity at the end of this interval is 18 rad/s. What is the angular acceleration of the wheel? Note that the initial angular velocity is not zero. Your answer

A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 2.15 rad/s2. Through what angle has the wheel turned when its angular speed reaches 72.0 rad/s?

A clay cylinder of radius 21 cm on a potter's wheel spins at a constant rate of 15 rev/s. The potter applies a normal force of 15.3 N to the clay with his hands where the coefficient of friction is 0.1 between his hands and the clay. What is the power (in W) that the potter has to deliver to the wheel to keep it rotating at this constant rate?

bob begins throwing a discus with an initial angular velocity of 4 rad/s. Just before releasing the discus, bob’s angular velocity is 20 rad/s.  The distance from the axis of rotation to the discus is 75 cm and the duration of the throw is 1.0 s.  What is the linear velocity of the discus just before release?

What constant angular acceleration is required to reduce an object's angular velocity from 36.7 rad/s to 12.6 rad/s over 11 revolutions?