Posted by **Jon** on Tuesday, June 18, 2013 at 11:07am.

A thin massless horizontal pipe rotates about a vertical axis with angular speed ω as shown in the figure. A small bug, located at a distance r from the axis, starts crawling inside the pipe at constant speed v (relative to the pipe). Because of the bug, the motor must develop the power

Pm=Cmω2vr

in order to keep the system rotating at constant angular speed ω. Determine the numerical coefficient C. m is the mass of the bug.

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