A) The spring AB has a stiffness of k=800 N/m and an unstretched length of 200 mm. Determine the force in cables BC and BD when the spring is held in the final stretched position shown. 400 mm A k= 800 N/m B. 300 mm D -400 mm 500 mm

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Unit Conversion

Standard units are also called SI units. SI units are used for measuring a physical quantity satisfying certain conditions. There are two types of units: fundamental units and derived units. Fundamental units are physical quantities that are independent, that is, they do not depend on other quantities like mass, length, or time. There are plenty of quantities in our lives which need to be measured and compared. Measuring is the comparison of a particular physical quantity with its reference value. A unit is a measure of a fixed physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.