Posted by Oisin on Wednesday, August 11, 2010 at 3:10pm.
The flywheel is initially at rest. A force of 250 N is applied tangentially to the rim, causing it to rotate about its central axis.
what is the energy acquired by it after 1 minute?
can anyone help me with this?

Physics  bobpursley, Wednesday, August 11, 2010 at 4:45pm
What is the KE after one minute:
angular acceleration=torque/momentInertia
torque= 250*r
if the flywheel is a solid disk, moment of interia is 1/2 Mass*r^2 (Check that).
angular acceleration= 500/rM
then finally, angular velocity=acceleration*time
wf= 500/rM * 60
and KE= 1/2 I w^2= 1/2 (1/2 Mr^2)(500/rM)^2= and that is it. Check my work and thinking.
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