we hung three different masses and measure the resulting angular acceleration (i

Question

we hung three different masses and measure the resulting angular acceleration (it is the slope of the angular velocity vs. time graph in Data Studio). Then we used the equation for I (above) to calculate the moment of inertia.

1) We hung three different masses yet we measured the same moment of inertia each time. Why?








2) The object with the largest moment of inertia does not have the largest mass. How is
this possible?




  
3) Write a paragraph of synthesis on how you can relate the physics of this lab in daily life?

Explanation / Answer

1) Moment of Inertia depends on Mass of object and Dimension of object. Like for a ring it is MR^2. Now different rings can have different M and different R such that their product is always the same. Hence different masses yet measure the same moment of Inertia.

2) Same as 1st part. Consider 2 rings with M1>M2 but R1<R2 such that M1R1^2< M2R2^2. Hence it is possible for largest moment of inertia object to not have largest mass.

3) Physics relates to so many parts of everyday life. The gravity that keeps everything in place on Earth is part of physics. The electricity that we use in homes and work are another example. And transportation would not be possible without knowledge of physics.

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