A .05kg bullet is moving to the right with a speed of 450 m/s when it strikes a 20 kg box that is also moving to the right with a speed of 5 m/s. the kinetic coefficient of friction between the box and the horizontal surface is 0.30. Determine a) The speed of the bullet-box unit when the bullet becomes embedded in the box of sand

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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.