A computer’s hard drive spins at 7200 RPM. What is the angular velocity in rad/s? What is the velocity in m/s of the hard drive at a radius of 0.0889 m?

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?