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A very light rod connects two masses, m1and m2. The rod is to be suspended by a string so that it hangs horizontally. Given that the length of the rod is D = 63.0 cm, find the appropriate position of the string (the distance x, as shown in the figure) for each of the following cases.
(a) m1 = 0.81 kg and m2 = 0.81 kg
(b) m1 = 0.81 kg and m2 = 0.39 kg

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The expert examines mechanics moments for a very light rod connecting two masses. A complete, neat and step-by-step solution is provided.

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Let the point on the rod where the string is attached be P. ...

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