Posted by Desperate!!!! on Monday, November 21, 2011 at 8:07pm.
A hot hair balloon is rising vertically 20 ft/sec while the wind is blowing horizontally at 15 ft/sec. Find the speed v of the balloon and the angle x it makes with the horizontal.
I know how to solve this problem, but I don't understand why or how you know it's a right angle.

physics?  Ms. Sue, Monday, November 21, 2011 at 8:11pm
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Please Help!!!!!!  Damon, Tuesday, November 22, 2011 at 3:33am
y axis velocity component = 20
x axis component = 15
tan x = 20/15
x = tan^1 (1.333) = 53.1 degrees
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