- #1
NinjaChachi
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Homework Statement
In our physics lab we were to set up a system looking like this:
where the mass was released and the velocity/acceleration and of the ring was calculated using MotionLab software. Our goal was to find the predicted total moment of inertia by just calculating the moment of inertia of the ring, disk, and axle and comparing it to the actual using the acceleration we get. It was very easy to calculate the total inertia but I am having trouble interpreting the graphs motionlab gave us and relating that to the total moment of inertia.
I will attach the graphs we obtained in one trial (keep in mind the line of best fit is not fully accurate as we were short on time)
Homework Equations
I think we use the following equation to relate acceleration of the system to total moment of inertia
I=r^2/a * m(g-a)
and I already found all the individual moments of inertia which was not a problem
The Attempt at a Solution
I tried plugging in 13.8 from the Vx/time equation into my above equation and did not get remotely close to the same moment of inertia. What do I actually use as my acceleration? Also, is that total moment of inertia equation correct?
Thanks