A700-gram grinding wheel 28.5 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 210 rpm about an axle perpendicular to its face through its center. when the power switch is turned off, you observe that the wheel stops in 41.0 s with constant angular acceleration due to friction at the axle. part a what torque does friction exert while this wheel is slowing down?

0.01524 Nm

Explanation:

= Final angular velocity = 0

= Initial angular velocity = 210 rpm

= Angular acceleration

= Angle of rotation

t = Time taken = 41 seconds

Converting rpm to rad/s

m = Mass of wheel = 700 g

r = Radius of wheel = 28.5 cm

Equation of rotational motion

Moment of inertia of a disc is given by

Torque is given by

The torque the friction exerts while slowing down is 0.01524 Nm

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.