Answer:
The combination, L = I / (m * R) , that appears in the equation for the period of a physical pendulum, is called radius of oscillations
Hope this helps :]
Answer:
This can be the FBD of the bag.
(my bag looks more like a box tho ^^")
In any case, your mass would be<em> 68 kg </em>no matter what
Check the attached file for the answer.