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April 16, 2014

Homework Help: physics

Posted by Edwin on Friday, March 26, 2010 at 2:33pm.

A flywheel of moment of inertia 0.32 kgm^2 is rotated steadily at 120rad/s by a 50 W electric motor. (i)find the kinetic energy and angular momentum of the flywheel. (ii) calculate the value of frictional couple opposing the rotation. (iii)find the time taken for the wheel to come to rest after the motor has been switched off.

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