A flywheel in the form of a heavy circular
disk of diameter 0.83 m and mass 111 kg is
mounted on a frictionless bearing. A motor
connected to the flywheel accelerates it from
rest to 1430 rev/min.
a)What is the moment of inertia of the fly-
wheel?
Answer in units of kg · m2
b)
How much work is done on it during this
acceleration?
Answer in units of J
a) I = (1/2) M R^2 for a disc.
b) Work done = final rotational kinetic energy
= (1/2) I w^2
w is the final angular velocity in radians/second