Posted by **george** on Tuesday, May 14, 2013 at 1:15pm.

Find the total kinetic energy of a 1500 g wheel, 700 mm in diameter, rolling across a level surface at 650 rpm. Assume that the wheel can be considered as a hoop.

(b) For the wheel in part (a), calculate the torque required to decrease its rotational speed from 400 rpm to rest in 9 s.

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