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John Barrer wrote:\_/^\_/^\_/^\_/^\_/^\_/^\_/^\_/^\_/^\_/^\_/^\_/^\_/^\
angular
Suppose a diver leaves the platform with NO
momentum. If she then bends at the waist, theEarth
can then supply the external torque to initiate
rotation. Now there is plenty of angular momentum
I don't see how the earth can apply a net torque to
a body in free
fall. Can you draw a free body diagram that shows
how this would
happen?
available to be conserved. Of course, if this istrue,
then it would be impossible to start the routinewith
a twist. A "tumble" (or some other rotation causedby
the diver orienting a portion of her body so thatan
external torque would be supplied by the Earth)would
have to initiate the dive or any other similarmove.
Is this so?? John Barrere Apex HS Apex, NC
http://www.dctech.com/physics/about_dc.html
Doug Craigen