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Sorry for the awful explanation - let me know if more clarification is needed.

EDIT: Here is an image of the experimental setup.

Anyways, once we had our data, we made a graph of Angular Speed squared (x-axis) and hanging mass (y-axis); this graph was linear and had an equation of y=3.26x+1.31. This graph was made for us based on our data, so even though those axes sound wrong (to me at least), that's how it's supposed to be. Anyways, using the equation for this graph, and the equation written below, we are supposed to be able to determine the experimental mass:

M = m * r / g * ω^2

where M is the experimental mass, m is the hanging mass, r is 16.00 cm, and ω/g obviously represent acceleration due to gravity and angular speed (squared).

I can not for the life of me figure out how to use these two equations to determine M.

Any help greatly appreciated!