Rotational Dynamics of a Handle with a Knob on One End

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The discussion centers on the rotational dynamics of a rod with a knob, focusing on the velocity and acceleration at the top and bottom of the knob. The main inquiry is whether the velocity and acceleration differ between these two points due to their respective distances from the origin. The user seeks clarification on whether the velocity is calculated using the radius in the x-y plane or if the height of the knob in the z-axis affects the calculations. The question emphasizes the need for assistance in understanding these concepts. Overall, the user is looking for a straightforward explanation of the dynamics involved.
judonight
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No responses, so let me change the question...

A rotating (in x-y plane) rod about one of it's ends.

At the other end, from the origin, is a knob with height into the z axis.

What is the velocity and acceleration at the top of the knob?

Is the velocity and acceleration at the top of the knob different than at the bottom?

Is it radius (in x-y plane, distance from origin) times omega = velocity

Or is the magnitude of radius need for origin to top of knob?

TIA!
 
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Updated question... please help, it's a simple question.
 

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