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Unformatted text preview: How does Physics work? How does Physics work? Observe and measure Build a model Make a prediction m a t h m a t h m a t h m a t h m a t h m a t h check units SI Units SI Units Length : The meter (1 m = 3.281 ft) Mass : The kilogram (1 kg = 0.06585 slug) Not the same as weight! on Earth 1 kg weighs 2.205 lb on the Moon 1 kg weighs 0.368 lb Time : The second (s) Used by scientific and engineering communities and almost everywhere in the world. Combinations: Unit of speed m/s Unit of force (Newton) is 1 N =1 kg m/s² Multiples of Units Multiples of Units 1024 yocto y 1021 zepto z 1018 atto a 1015 femto f 1012 pico p 109 nano n 106 micro μ 103 milli m 102 centi c 10 3 kilo k 10 6 mega M 10 9 giga G 10 12 tera T 10 15 peta P 10 18 exa E 10 21 zetta Z 10 24 yotta Y Formal conversion of units: • Multiply by the appropriate representation of 1 to cancel the unwanted units away: • eg. convert 10 mph into m/s = × × = mile 1 m 1609 s 3600 h 1 h mile 10 h mile 10 m/s 47 . 4 = Example...
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 Fall '08
 HerreraSiklody
 Mass, Work, Trigraph, International System of Units, Kilogram, Litre, Imperial units, significant figure

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