An anemometer for measuring wind speed consists of four metal cups, each of mass m = 146 g, mounted on the ends of essentially massless rods of length L = 0.3 m. The rods are at right angles to each other and the structure rigidly rotates at f = 12 rev/s. Treat the cups as point masses.(adsbygoogle = window.adsbygoogle || []).push({});

a) What is the moment of inertia of the anemometer about the axis of rotation?

I know moment of inertia is calculated by the sum of masses times distance to axis of rotation. I tried to substitute (L^2)/2 as my distance to the rotational axis, and I know it's 4 times each mass, (I also converted to kg) so I got 0.0827 but it's not correct. Any help would be appreciated

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# Homework Help: Moment of Inertia and anemometer

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