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Homework Statement
We recently had a Physics lab where we were expected to find a relationship between the moment of inertia and discs of varying radius (discs have same mass), and develop a general equation to illustrate the relationship between moment of inertia and radius for discs of any mass.
Homework Equations
The general formula of the line is Inertia = (constant k)Radius^2 + Inertia_0
Inertia = mr^2((g/a)-1)
The Attempt at a Solution
I have managed to determine the average time, acceleration, and moment of inertia with the experimental time. I have figured out that the relationship between disc radius and moment of inertia is Inertia = Radius^2 (I believe). However, my current problem is a graph of Inertia vs Radius^2 -- my current line of best fit is y=0.7767020443x + 0.00017554163. The general formula of the line is Inertia = (constant k)Radius^2 + Inertia_0 . I have been unable to isolate k, and thus determine the relationship between k and the mass of the discs. (it should be a basic fraction). Also, I am having trouble understanding the significance of Inertia_0 -- should there not be any inertia if the disc has a radius of 0?
Thanks for any assistance you can offer!