Question: The Roberval balance is in equilibrium when no weights are placed on the pans A and B. If two masses mA and mB are placed

The Roberval balance is in equilibrium when no weights are placed on the pans A and B. If two masses mA and mB are placed at any location a and b on the pans, show that equilibrium is maintained if mA dA = mB dB.

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