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Centripetal Force Question

by jibjab
Tags: centripetal, force
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jibjab
#1
Oct2-09, 03:00 PM
P: 13
1. The problem statement, all variables and given/known data
A skater holds her arms outstretched as she spins at 225 rpm. What is the speed of her hands if they are 152 cm apart?

3. The attempt at a solution
I converted 225 rpm to 3.57 rps and found the angular velocity (23.56 rad/s) to plug into the equation v=wr, but it didn't work. What would that distance between her hands be considered? I bet this is rediculously easy but I can't figure it out! Thanks in advance!
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RoyalCat
#2
Oct2-09, 03:06 PM
P: 671
As she spins, the tips of her hands trace out a circle, the diameter of which is the distance between her two hands.
jibjab
#3
Oct4-09, 04:42 PM
P: 13
Ah thank you!


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