9/8/10 19/8/10 23 9/8/10 * You also won’t get much partial credit on exams if you put numbers in too early since we may not be able to tell what equations you are using and why!4 333cm 5cm 4cm 1 =+)(anythings 5cm 4 cm 12+ 9/8/109/8/10 5 r(x) = 201+ xx2+19/8/10 69/8/10 7 Why choose this? –concepts of measurement, rate of change, force are fundamental –ties to everyday experience so can use and learn to build/refine intuition9/8/10 89/8/10 99/8/10 10 iˆixrˆ=iˆ9/8/10 119/8/10 12 iˆ r = xˆ i + yˆ j ˆ j9/8/10 13 This is like the difference between position and length!9/8/10 14 r t()= x(t)ˆ i + y(t)ˆ j x(t) r = r t2() r t1()t = t2 t19/8/10 15 rt rt rtrrtrtrrtrtrrrrt rt rt rtrt rt() () ()() ()() ()() () () ()() ()12312 2 123 3 213 12 23213231 = = =+= + = 9/8/10 16 o Choose origin o Choose axes o Choose scale o Set scales on graph o Take data from video9/8/10 17 <>=<>=vvrtdisplacementtime it took to make the displacement9/8/10 18 <>= == ==+vrtvrvtrt rt v trrvtfinal initial002100() ()Position as a function of time0246810-5 0 5 10 15t (sec)x
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