To start her lawn mower, Julie pulls on a cord that is wrapped around a pulley. The

Question:

To start her lawn mower, Julie pulls on a cord that is wrapped around a pulley. The pulley has a moment of inertia about its central axis of and a radius of 5.00 cm. There is an equivalent frictional torque impeding her pull of τf = 0.430 m ∙ N. To accelerate the pulley at α = 4.55 rad/s2,
(a) How much torque does Julie need to apply to the pulley?
(b) How much tension must the rope exert?