116. (a) One particle is on the axis, so
r
= 0 for it. For each of the others, the distance
from the axis is
r
= (0.60 m) sin 60° = 0.52 m.
Therefore, the rotational inertia is
Im
r
ii
==
⋅
¦
2
027
..
kg m
2
(b) The two particles that are nearest the axis are each a distance of
r
= 0.30 m from it.
The particle “opposite” from that side is a distance
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Inertia

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