Question

A 200g puck revolves in a circle on a frictionless table at the end of a 50.0cm long string. The puck's angular momentum is 3.00kg m^2/s
What is the tension in the string?

Answer 1

The tension of the string must equal to centripetal force.
\(T=m\omega ^2r\)
We have to find omega first from angular momentum,
\[L=I\omega\\L=mr^2\omega \\ \omega=\frac{L}{mr^2} \]