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A 1 foot diameter disk is welded onto a 2 foot long thin bar; pivots at pin P; no friction. 

1)Released

from rest when horizontal, what is reaction at pin P when released. (Hint first find I(p), and assumr w=0)


2) When pendulum rotates to vertical position, what is the reaction at pin P. (Hint, need to use energy method to find angular velocity w. Then find focus)

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