Question

1a) The rotation of a 11 kg motorcycle wheel is depicted in the figure. The wheel should be approximated to be an annulus of uniform density with inner radius R₁ = 29 cm and outer radius R₂ = 34 cm.Calculate the rotational kinetic energy in the motorcycle wheel if its angular velocity is 132 rad/s in J.

1b)Suppose you start an antique car by exerting a force of 270 N on its crank for 0.28 s.What angular momentum is given to the engine if the handle of the crank is 0.22 m from the pivot and the force is exerted to create maximum torque the entire time?

Answer 1