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A uniform beam 1 m long is supported on ...

A uniform beam 1 m long is supported on knife-edge at 60 cm from left end. A mass of 100 g is suspended at a distance of 50 cm and a mass of 50 g is suspended at 20 cm from same end. From where should the mass of 200 g be suspended so that beam will remain horizontal. Also find normal reaction at the support.

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