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thebest100
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Homework Statement
A turntable of radius 25 cm and rotational inertia 0.0154 kg m^2 is spinning freely at 22.0 rpm about its central axis, with a 19.5-g mouse on its outer edge. The mouse walks from the edge to the center. Find (a) the new rotation speed and (b) the work done by the mouse.
Homework Equations
W = Kf - Ki
Inertia for a disk is MR^2
Intertia for a ring is (1/2)MR^2
The Attempt at a Solution
solution to part A) 23.7 rpm
i have tried the following but they all seem to be wrong (303 mJ, 3.3 mJ, 127 mJ)
the answer to part B must be in mJ
please give me an idea on how to solve part B.
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