An electric motor rotating a workshop grinding wheel at a rate of 9.00×10^1 rev/min is switched off. Assume the wheel has a constant negative angular…

An electric motor rotating a workshop grinding wheel at a rate of 9.00×10^1 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.60 rad/s2. (a)How long does it take for the grinding wheel to stop? (b) Through how many radians has the wheel turned during the interval found in (a)?