A Machinist Turns the Power on to a Grinding Wheel,which

Question 33
Multiple Choice

A machinist turns the power on to a grinding wheel,which is at rest at time t = 0.00 s.The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 25 rad/s. The wheel is run at that angular velocity for 37 s and then power is shut off.The wheel decelerates uniformly at 1.5 rad/s2 until the wheel stops.In this situation,the time interval of angular deceleration (slowing down)is closest to: A) 17 s B) 15 s C) 19 s D) 21 s E) 23 s