Question

To start a lawn mower, you must pull on a rope wound around the perimeter of a flywheel.

After you pull the rope for 0.95s, the flywheel is rotating at 45 revolutions per second, at

which point the rope disengages. This attempt at starting the mower does not work, however,

and the flywheel slows, coming to rest 0.24s after the disengagement. Assume constant angular

acceleration during both spin-up and spin-down.

(a) Determine the average angular acceleration during the 4.5s spin up and again during the 0.24s spin down.

(b) What is the maximum angular speed reached by the flywheel?

(c) Determine the ratio of the number of revolutions made during spin-up to the number made during spin-down

Answer 1