![]() Something else to keep in mind is that when values are multiplied or divided, they can have different units. If you want to know how fast this is in miles/hour, the conversion would be carried out like this:ġ0.35 m/s x (1 mile / 1609 m) x (3600 s / 1 hour) = 23.2 miles / hour.Īll you do to convert is multiply the original value by x/y, where x and y are the same thing, expressed in different units. When he set the 200-meter world record, 19.32 seconds, Michael Johnson ran at an average speed of 200 m / 19.32 s = 10.35 m/s. ![]() If you have a cube which is 10 cm on each side, then the volume is simply the length x the width x the height:Ĭonsider a slightly more complicated example, with two steps rather than one. ![]() Be extra careful if you have units which are squared, cubed, or have some other exponent. You will often need to convert a value from one unit to another, converting from centimeters to meters, for example. You should know all of these off by heart. The more common prefixes used in the metric system, and the powers of ten associated with them, are given in the table below. MKS (meter-kilogram-second) units are part of the metric system, based on powers of ten to keep things simple. If you're unfamiliar with some of these concepts, spending the time to become fluent will help you immensely in the course. The same holds true for physics.This introduction to physics is simply a review of the language of physics. Knowing a little of the language would help you somewhat being fluent in the language would help you immensely. If you were taking a trip to Greece, you'd get the most out of your trip if you learned some Greek before going. Introduction to Physics Introduction to Physics
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