The child on the disk walks inward on the disk and ends up standing at a new location a distance r/2 = 0.95 m from the axle. now what is the angular speed? (it to do this analysis algebraically and plug in numbers at the end.

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to: