week1-2 - Units System There are many systems of units When...

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1 Units System There are many systems of units When solving problems, use the same system for different quantities. Then covert it to any other systems you want For this class we use the SI system ( International System of Units). SI Length – hand, foot, mile,… meter Time – sundial, water clock, second Mass – pound, ton, gram… kilogram Volume – peck, bushel, cup … cubic meter Area - acre, square mile, hectare square meter 1/7/2011
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2 Conversions, prefixes and scientific notation giga 1,000,000,000 10 9 billion mega 1,000,000 10 6 million kilo 1,000 10 3 thousand centi 1/100 0.01 10 -2 hundredth milli 1/1000 0.001 10 -3 thousandth micro 1/1,000,000 1/10 6 10 -6 millionth nano 1/1,000,000,000 1/10 9 10 -9 billionth 1 in 2.54cm 1cm 0.394in 1ft 30.5cm 1m 39.4in 3.281ft 1km 0.621mi 1mi 5280ft 1.609km 1lb 0.4536kg g =9.8 1kg 2.205lbs g=9.8 Appendix b 1/7/2011
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Vector and Scalar Quantities 1/7/2011 3 77 82 83 68 55 66 83 75 80 90 91 75 71 80 72 84 73 57 88 92 77 56 88 73 64 Scalar has only amplitude, e.g. the temperature Vector has both amplitude and direction, e.g. the wind
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Vector Addition and Subtraction 1/7/2011 4
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We need clear, precise definitions What’s the difference between: average speed and instantaneous speed ? speed
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This note was uploaded on 04/23/2011 for the course PHYS 214 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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week1-2 - Units System There are many systems of units When...

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