A 700~gram grinding wheel 23.0 cm in diameter is in the shape of a uniform solid disk. (We can ignore the small hole at the center.) When it is in use, it turns at a constant 230 rpm about an axle perpendicular to its iaoe through its center. When the power switch is turned off. you observe that the wheel stops in 42.5 s with constant angular acceleration due to friction at the axle. Part A What torque does friction exert while this wheel is slowing down? Express your answer newton-meters. MW? N - m, in the direction opposite to the motion m R_eques|