Re: Conservation of angular momentum
- From: Sam Wormley <swormley1@xxxxxxxxx>
- Date: Sun, 27 May 2007 20:36:51 GMT
Peter wrote:
If a point object collides with an arm of an equal-arm lever and
stops on impact, it transfers all its momentum to the lever. If an arm
of a rotating equal-arm lever collides with a point object and stops
on impact, it transfers all its momentum to the point object. If
angular momentum were r x p, there are many cases where this would be
impossible to happen (I have specific examples, if you want to hear
about them).
That's not right Peter.
Momentum
http://scienceworld.wolfram.com/physics/Momentum.html
Momentum is a conserved quantity, meaning that the total momentum
of any closed system (one not affected by external forces, and
whose internal forces are not dissipative in nature) cannot be
changed.
Angular Momentum
http://scienceworld.wolfram.com/physics/AngularMomentum.html
The total amount of angular momentum does not change with time no
matter how the objects interact with one another.
.
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