Linear motion means movement in a straight line. The equations that describe this motion are used in the programs that run elevators, computer numerical control (CNC) milling machines, military ballistics, and robotic arms that put together anything from automobiles to electronic circuit boards. This chapter will describe how to measure and calculate this motion.
A rate is a measure of how something changes over time. For example, the rate of water flowing out of a faucet is measured in gallons per minute (gal/min), and the rate of a machine gun firing is measured in rounds per second (rounds/s). Rates have units of some quantity over time (quantity/time). Speed is also a rate. Speed is a measure of how far something ...
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