You could use linear density (mass per unit length) if you want the mass. You only need the mass if you want accurate calculation of the speed in real units. If you just want the motion around the spindle, you can set the mass=1 arbitrary unit and integrate the magnitude of F_perp as you go around to determine the relative speed at any given point.

In reply to Re^4: [OT] Forces. by bitingduck
in thread [OT] Forces. by BrowserUk

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