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Unformatted text preview: ~~ = 0.14 rad/min when e = n/4 dy _? Y'/ dt . when e = 7[/4 500 ft Step 2: Write down the additional numerical informarion. da .= 0.14rad/min dl when Step 3: Write down what we are asked to find. We wane dy /dl when a = 7T /4. Step 4: Write an equation that relates the variablesy and e. y= tan a, or y = 500tan a 500 Step 5: Differentiate with' respect to t using the Chain Rule. The result tells how dy/dt (which we want) is related to de/de (which we know). dy ? de .= 500secedt dt Step 6: Evaluate with a = )(/4 and da/dt = 0.14 to find dy/dt. d . . .~ = 500(,J2)2(0.14) = (1000)(0.14) = 140 dt . see .:::.=.J2 4 At .themoment in question, the balloon is rising at the rate of 140 ft/rnin....
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This note was uploaded on 09/08/2008 for the course EAC 101 taught by Professor Tyler/ralston during the Fall '08 term at University of Louisville.
 Fall '08
 Tyler/Ralston

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