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Homework Statement
On an ice rink two skaters of equal mass grab hands and spin in a mutual circle once every 2.5s. If we assume their arms are each 0.80m long and their individual masses are 55.0kg , how hard are they pulling on one another?
Homework Equations
## a_c = \frac {v^2}{R} ##
## v = \frac {D}{T} ##
## D = 2 \pi R ##
The Attempt at a Solution
With R = 0.8, and m = 55kg, I plugged it into ##F = m a = m \frac {v^2}{R} ## and I got the right answer. However, I don't understand why I have to use m = 55kg, rather than 110 kg (as there are two people spinning).
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