# Homework Help: Angular velovity (flywheel)

1. Feb 8, 2012

### The-alexandra

1. The problem statement, all variables and given/known data

If we only know the force Fr, Find the angular velocity of the flywheel.

2. Relevant equations

3. The attempt at a solution

in the pulleys

F=F1=F2=F3
Fr=(F Sin β)/sin (β/2)=2F cos (β/2)
F = (2 cos (β/2))/Fr

so now for the flywheel

τ=RF and τ=Iα ................. τ = torque α = angular acceleration

so

α = 2F / MR

could you tell me if I'm right ?? and how can I can find the angular velocity.??
thank so much for your help

Last edited: Feb 9, 2012
2. Feb 8, 2012