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A ball with radius 0.081 m and mass 1.03kg is attached by a rod of length 4.5 m to a second ball with radius 0.1m and mass 1.94 kg . Suppose the rod is uniform with mass 1.53 kg .

Where is the system's center of gravity? Express answer as a distance measured from the center of the small ball.

I used the formula (m1d1+m2d2) / m1+m2, and it's wrong.i get confused since sometimes i see that they use a zero for m1d1, why is that?. and.. do i have to use the mass of the rod??

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# Homework Help: Center of gravity of a ball

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