A800-gram grinding wheel 27.0 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 245 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 50.0 s with constant angular acceleration due to friction at the axle?

Explanation:

d = Diameter of wheel = 27 cm

r = Radius =

m = Mass of wheel = 800 g

= Initial angular velocity =

Equation of rotational motion

Moment of inertia is given by

Torque is given by

The torque the friction exerts is -0.0037406448 Nm

For more information on torque and moment of inertia refer

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

a displacement distance is size of displ