What are the moment of inertia, angular speed, and angular kinetic energy?

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In summary, an electron with a mass of 9.11*10^-31kg moves in a circular orbit around a nucleus with a mass of 1.67*10^-27kg. The radius of the orbit is 5*10^-11 meters and the angular momentum is 1.05*10^-34 kg*m^2/s. To find the moment of inertia, we need to find the angular speed. To do this, we can find the speed of the electron and use the equation for the moment of inertia of a point mass at a distance r from the center of rotation.
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Homework Statement



an electron (mass 9.11*10^-31kg) moves in a circular orbit around nucleus of mass 1.67*10^-27kg. if the radius of orbit is 5*10^-11 meters and the angular momentum is 1.05*10^-34 kg*m^2/s

find moment of inertia
angular speed
angular kinetic energy

Homework Equations





The Attempt at a Solution



to find I, we need W (angular velocity). How do i find this if i just have 2 masses and radius?
 
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well can you find speed of electron?
 
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gamer1319 said:
to find I, we need W (angular velocity). How do i find this if i just have 2 masses and radius?

What's the moment of inertia of a point mass at a distance r from the center of rotation?
 

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