Physics
posted by Tina on .
A roller in a sheetmetal processing plant has a diameter of 1.77 m and a mass of 5871 kg. Assume the roller is a solid cylinder.
a) What is the moment of inertia of the roller?
b) What is the kinetic energy of the roller when it spins at 4.28 rad/s?
Please provide all work and equations. Please include the actual answer and the steps that were taken to come up wih that answer. The equation with numbers filled in does not completely help me. Thanks.

a) I=mR²/2
http://cnx.org/content/m14292/latest/
b) KE= Iω²/2
http://www.dummies.com/howto/content/howtocalculaterotationalkineticenergy.html