University Physics 1021, Feldman
Introduction
In this lab, we used many different conceptual techniques to convert data taken into
meaningful information.
We used our knowledge of torque to calculate the moment of Inertia of the weight
on the string.
Basically, Torque = (Moment of Inertia * α).
α is equal to ω/t which
is equal to v/(r*t) which equals a/r.
Substituting this in for α, you get the equation
Torque = Moment of Inertia * α.
Torque, based on the lever arm, is equal to the
radius*weight of the piece on the string.
By setting these two equations equal to
each other, it was easy to substitute in all known values and find I.
Other math skills were at use in this lab, such as the ability to relate equations and
sum forces, then cancelling and rearranging equations until we the found the values
we were looking for.
We also increased our abilities with logger pro, using the sensor, and using the
cylinderandstring system.
We implemented prior knowledge of measuring
accurately with a ruler (measuring the string).
We also learned how to use a
vernier caliper and used it to measure the diameter of the cylinder.
Finally, we used our new knowledge of forces and our knowledge of freebody
diagrams to solve for the weight of the 10gram piece and find the moment arm. In
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 Spring '11
 ProfessorFeldman
 Physics, Force, Inertia, Moment Of Inertia

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