Physics four problem questions
Subject: Physics   / General Physics
Question
1. The moment of inertia of a body depends not only on its mass, but also on how the mass is distributed. Does your data support this? Why or why not?
2. Discuss the consistency of the slope of the plot of I vs. r2 with the value you measured for (m1 + m2). If they are not consistent, suggest possible reasons why. The uncertainty in your measured mass is given by:
$(m1 + m2) = $(m1) + $(m2)
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Last updated October 23, 2014 857. Rotational Motion: Moment of Inertia
3. In your plot of I vs. r2, why did you use r2 and not r in the plot? What are the units of the slope of I vs. r2?
4. In the procedure, you were given that R = 1.27 ± 0.01 cm. Using only the experimental apparatus and a meter stick, how would you verify this radius with an uncertainty of less than or equal to 0.01 cm?
(Hint: You cannot get this uncertainty by holding the meter stick next to the axle and measuring the diameter. Also note that the string is a part of the apparatus.)
