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Rotation about a Fixed Axis & its Forces

If a rigid body is rotating around a fixed axis the tangential and normal components would have to be considered along with the effects of the mass moment. The equations that would be used to solve a problem that has rotation about a fixed axis can be seen below.

(Eq 1) $F_n=ma_n$

(Eq 2) $F_t=ma_t$

(Eq 3)  $∑M=Iα$

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