For a point mass, $\tau=I\alpha$ and $L=I \omega$.

What if we apply a force to the edge of an ellipse, if the torque is $rF\sin\theta$, where $r$ is the distance between the point where the force is applied to the centre of mass of the ellipse, then the equation relating angular momentum and this force will then be $rFt\sin\theta=I\omega$ or $mvr\sin\theta=I\omega$, where "I" will be the moment of inertia of ellipse about its centre of mass. However, $mvr\sin\theta$ is the angular momentum of a point mass instead of an ellipse.

What is the mistake? Thank you.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.