Answer Happy

Question 10 (1 point) An android turns on the power on to a grinding wheel at time t= 0 s. The wheel accelerates uniformly from rest for 10 seconds and reaches the operating angular speed of 40 rad/s. The wheel is run at that angular velocity for another 10 seconds and then power is shut off. The wheel slows down uniformly at 2 rad/s2 until the wheel stops. For how long after the power is shut off does it take the wheel to stop? 80 seconds 8 seconds 10 seconds 20 seconds 4 seconds 5 seconds