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Two balls of mass m each are hung side b...

Two balls of mass m each are hung side by side by side by two long threads of equal length l. If the distance between upper ends is r, show that the distance r' between the centres of the ball is given by `g r'^(2)(r-r')=2l G m`

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PHYSICS GALAXY - ASHISH ARORA-GRAVITATION-Unsolved Numerical
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