5. Determine the horsepower developed by a passenger car traveling at a speed of 60 mph on an upgrade of 4% with a smooth pavement on a straight road section. The weight of the car is 4500 lb and the cross-sectional area of the car is 45 ft². The coefficient of drag is 0.4. If for the same road, this is for a 24000-lb truck with a cross-sectional area of 100 ft² and coefficient of drag of 0.5 traveling at 50 mph, what is the horsepower?

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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.