Answer:


Step-by-step explanation:
d = Diameter of wheel = 6 in
r = Radius = 3 in =

t = Thickness =

w = Specific weight =

= Time taken to slow down = 35 s
= Time taken to reach operating speed = 5 s
= Angular velocity =

Weight is given by

Mass is given by

Moment of inertia is given by

Angular acceleration while slowing down is given by

Frictional moment is given

Frictional moment is

Angular acceleration while speeding up is given by

Motor torque is given by

Motor torque is
.