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Ballistic Ball Traditional Geocache

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wesi: Retired

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Hidden : 5/24/2014
Difficulty:
2 out of 5
Terrain:
2.5 out of 5

Size: Size:   micro (micro)

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Geocache Description:


Golf balls are dimpled to reduce drag. Somewhat counter-intuitively, a dimpled ball has better aerodynamics than a perfectly smooth sphere, because the air flow around a dimpled ball generates lift, much like with an airplane wing.



To determine a golf ball's trajectory, you have to use the drag coefficient in a Navier-Stokes equation together with initial velocity, angle of launch, as well as spin, to derive the intensity of the Magnus effect, and ultimately the flight path and distance.



For the ball to have landed at the given coordinates, where on the adjacent golf court was the golfer? Assume an ideal (incompressible) dimpled golf ball, and a 3-iron stiking 1/10th of an inch below the ball's equator to impart backspin, for the ball to launch at a 42 degree angle, with a speed of 122mph.



Please do not disturb the naturally abundant camo / decoys.

Additional Hints (Decrypt)

syng ebpx jvgu pnvea ba gbc, n pbhcyr srrg bss ovt snyyra gerr. pnpur vf vzzrqvngryl nqwnprag gb gung ebpx, ba gur fvqr njnl sebz gur gerr

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)