Posted by **Lauren** on Thursday, July 5, 2012 at 11:33pm.

A revolving door consists of four rectangular glass slabs,with the long end of each attached to a pole that acts as the rotation axis. Each slab is 2.60m tall by 1.50m wide and has mass 39.5 .

Find the rotational inertia of the entire door.

If it's rotating at one revolution every 10.5 , what's the door's kinetic energy?

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