As shown in the figure a rigid beam with a negligible mass is pinned at O and supported by 2 rods identical except for length. If P=30KN, find the load in rod A and B in KN. If rod A elongates by 2mm how much is the elongation of rod B in mm?

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British Gravitational Bg System Of Units

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.