A grinding wheel of radius 0.36 m, which starts from rest, rotates at 1850 revolutions per minute (RPM) and has a moment of inertia of 600 kg m2.
a. What is the angular momentum of the grinding wheel?
b. If torque (T) is defined as the change in angular momentum divided by time, how much torque is required to stop the grinding wheel in four seconds? In one second?