A flywheel in the form of a solid disk, the moment of inertia of which J, rotating with equal deceleration during braking

A flywheel in the form of a solid disk, the moment of inertia of which J, rotating with equal deceleration during braking, during time t reduced the frequency from ω1 to ω2. Determine the work of the braking force.

The work of inertial forces is equal to the change in kinetic energy. The flywheel in the form of a disk rotates equally slowly. The work of inertia forces is found by the formula A = Ek1 – Ek2 = J * w1 ^ 2/2 -J * w1 ^ 2/2 = J * w2 ^ 2 – w1 ^ 2/2.
Answer: the work of inertial forces is J * w2 ^ 2 – w1 ^ 2/2.