Question: 9 . A rotor spins at 2 4 0 0 RPM and has an observed unbalance of 3 0 g at a radius of 2

9. A rotor spins at 2400 RPM and has an observed unbalance of 30 g at a radius of 20 cm. Determine the balancing mass required and its placement radius if the balancing mass needs to be placed at a radius different from 20 cm to achieve perfect balance.

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