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## Homework Statement

A ball of mass m is attached via a rod of length x to an axle that rotates with angular velocity ω. You can consider the ball to be a point mass.

m = 5 kg, x = 0.3 m, y = 0.4 m, ω= 30 rad/s

(a) What is the linear momentum (direction and magnitude) of the ball?

(b) What is the angular momentum (direction and magnitude) of the ball about point A?

I've included a diagram I made.The top ball has mass m = 5 kg and the bottom ball A is rotating with angular velocity ω. Hopefully that diagram makes sense...

## Homework Equations

I = mr

^{2}

L=Iω

p=mv

v=rω

## The Attempt at a Solution

(a) p=mv

v=rω=0.3m*30rad/s=9m/s

p=5kg*9m/s=45kgm/s clockwise

(b) L=Iω

L=mr

^{2}ω

This is where I am confused. It would be easy to calculate if A wasn't rotating but how do I . calculate the angular momentum of the ball about point A given the fact that A is rotating?