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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