33-34 Time Rates: A car traveling east and airplane traveling north Jhun Vert Thu, 05/07/2020 - 07:40 pm

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.
 

Problem 34
In Problem 33, find how fast the two will be separating after along time.
 

725 Centroid of windlift of airplane wing | Centroid of area Jhun Vert Sun, 04/19/2020 - 11:40 pm

Problem 725
Repeat Problem 239 without using integration.
 

239 Resultant of lift on the wing of an airplane Jhun Vert Sat, 04/18/2020 - 05:00 pm

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.