# Instant center of rotation in plane motion

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ans.

a) 1.333 in. above A;

b) 085 ft./sec. right.

c) 60.2 ft. / sec. @48.4 deg.

https://brainmass.com/physics/rotation/instant-center-rotation-plane-motion-14937

#### Solution Preview

a.) Let instant center of rotation is at height y from the bottom most point. At center of rotaion velocity will be zero.

hence,

5/y = 40/(12-y)

=> 40*y = 60 - ...

#### Solution Summary

The answer is given step-by-step and a diagram is attached.

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