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# The figure below shows a rigid 3-mass system which can rotate about an axis perpendicular to the system. The mass of each connecting rod is...

The figure below shows a rigid 3-mass system
which can rotate about an axis perpendicular
to the system. The mass of each connecting
rod is negligible. Treat the masses as particles.
The x-axis is along the horizontal direction
with the origin at the left-most mass 5 kg.
The masses are separated by rods of length
5 m, so that the entire length is 2 (5 m).
Determine the x-coordinate of the center of
mass for the three-mass system with respect
to the origin.

Ans) Let us assume that the origin lies at distance x from origin as shown in figure.
Then, x = (5*0 + 7*5 + 6*10)/(5 + 7 + 6)
= 95/18 = 5.28 m
The centre of mass lies at a distance of 5.28 m from...

## This question was asked on Oct 19, 2010 and answered on Oct 20, 2010.

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