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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 2.35mtall by 1.25m wide and has mass 32.0kg .
A. Find the rotational inertia of the entire door:
I
B. If it's rotating at one revolution every 9 seconds whats the door's kinetic energy:
K
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