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725 Centroid of windlift of airplane wing | Centroid of area

Problem 725
Repeat Problem 239 without using integration.
 

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239 Resultant of lift on the wing of an airplane

Problem 239
The 16-ft wing of an airplane is subjected to a lift which varies from zero at the tip to 360 lb per ft at the fuselage according to w = 90x1/2 lb per ft where x is measured from the tip. Compute the resultant and its location from the wing tip.
 

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33-34 Time Rates: A car traveling east and airplane traveling north

Problem 33
From a car traveling east at 40 miles per hour, an airplane traveling horizontally north at 100 miles per hour is visible 1 mile east, 2 miles south, and 2 miles up. Find when this two will be nearest together.
 

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