It is generally a good idea to gain an understanding of the \"size\" of units. E

ID: 2251044 • Letter: I

Question

It is generally a good idea to gain an understanding of the "size" of units. Either using an Internet search, or referring to the hint panel below, find the official size and masses of the sports balls listed below and calculate their moments of inertia about their center of mass. Rounding your results to the nearest power of 10, categorize each of the sports balls according to the order of magnitude of the moment of inertia. (Note that some of the balls are hollow.)

As a physics demonstration, you want a special bowling ball made to demonstrate exactly 1 kg

10-5 Kg.m2 10-4 Kg.m2 10-3 Kg.m2 10-2 Kg.m2 10-1 Kg.m2 1 Kg.m2

Explanation / Answer

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I = 1

density = 12.433 kg/m^3

1 = (2/5)(12.433 x (2/3) xpi x r^3) (r^2)

r = .625 m

=> r = 24.63 inches

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It is generally a good idea to gain an understanding of the \"size\" of units. E

It is generally a good idea to gain an understanding of the \\\"size\\\" of unit

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It is generally a good idea to gain an understanding of the \"size\" of units. E

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