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  • A rod of weight w is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives

A rod of weight w is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives

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A rod of weight w is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance d from each other. The centre of mass of the rod is at distance x from A. The normal reaction on A is:

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The centre of mass of the rod is at distance x from A. The normal reaction on A is:

By \ Equating \ forces . \\N_1+N_2=W \\ Equating \ Torques \ about \ A \\ Wx=N_2d =>\\N_2=Wx/d \\So N_1=W[1- (x/d)] \\.°. \ Normal \ reaction \ on \ A \ is \ W[1- (x/d)]

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