# Motion at a Fixed Point

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Please see attachments for my question about a rotating radar antenna's angular velocity.

Please use i, j and k vector coordinates to solve.

https://brainmass.com/physics/rotation/motion-fixed-point-15849

#### Solution Preview

a)

Because,

(vA)y - (vB)y = r_dish*wx

r_dish = radius of antenna dish

=> wx = (15-9)/10 = 6/10 = 0.6 rad/s (counter-clock wise)

wz = (vB)y/r_arm

r_arm = length of arm = ...

#### Solution Summary

The solution shows the step-by-step calculations to reaching the answer of the question posed on motion at a fixed point in the case of a rotating radar antenna.

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