Question

If, after rotating for some time at constant angular velocity of 72 rad/s, brakes are applied to the flywheel
producing retardation of 4 rad/s2
, determine the time taken to reduce its angular velocity to 40 rad/s.

Answer 1

V = Vo + a*t
V = 40 rad/s
Vo = 72 rad/s
a = -4 rad/s^2
Solve for t

Answer 2

16 sec