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# Rotational Motion - Lab Report Example

## Extract of sample Rotational Motion

The mass and dimensions of the steel block were measured together with the errors due to measurement. The Data studio (DS) data acquisition program was opened and a file Desktop-pirtlabs-PHY 122-Rotational motion. The file was preset to record θ (t) and ω (t).
Part I: The block was attached through its shortest axis onto the rotary encoder. The string was put on the medium pulley and wind it up entirely in a direction so it will unwind CCW (counterclockwise) when facing the pulley. Then readings were taken.
Therefore, the dynamic moment of inertia along the short axis is greater than one for the long axis. However, the theoretically calculated static moment of inertia lies within the range defined by the dynamic moments of inertia calculated practically. It is however important to notice that the dynamic moments of inertia obtained are of the same order with Id for medium pulley through short axis (Id = 1.66 * 10-4) being slightly higher for the long axis (Id = 1.52 * 10-4). The moments of inertia obtained are affected by the distribution of mass from the center of mass of the object used. Thus, accurate and precise measurement of parameters that determine the moment of inertia can produce results that are close to the absolute results predicted through theoretical ...Show more

## Summary

For a rectangular block of dimensions, a × b × c has moment of inertia for a rotation about an axis normal to a × b face and passing through the center of…
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