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Thread: Judging Height and Distance
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03-03-2006, 01:02 PM #21Originally Posted by Iceaxe
Looks like its time for a high school physics refresher course!
Gravity is an acceleration, not a velocity. 32 ft/(second squared).
After doing the calculus the equation for distance in feet works out to
16 * (fall time seconds squared). Not too difficult to remember.
After 1 second the rock will have fallen 16 feet.
2 seconds: 16 * 4 = 64 feet.
3 seconds: 16 * 9 = 144 feet
4 seconds: 16* 16 = 256 feet
5 seconds: 400 feet
6 seconds: 576 feet
7 seconds: 784 feet
etc.
Terminal velocity is around 293 ft/sec (200 mph) for a round rock.
Terminal velocity would be reached after falling 1341 feet or 9.1 seconds
at which point you could just add 293 for each second but would probably be too high to hear.
A rock falling from the top of el capitan (3000 ft or so) would take 13 seconds to hit. A body would take a second or two longer unless they were in dive bomber postition.
Fun stuff. Good tool to have on hand, glad the questionable math made me think about it long enough to figure it out. Story problems are fun!
Dang i'm a nerd
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03-03-2006 01:02 PM # ADS
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03-03-2006, 01:10 PM #22Originally Posted by rock_ski_cowboy
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03-03-2006, 01:22 PM #23Originally Posted by Iceaxe
Didn't we already have this discussion?
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03-03-2006, 02:29 PM #24Originally Posted by rockgremlin
Eric.
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03-03-2006, 02:54 PM #25
Somewhere I have a TR from the first group that did Heaps. I'll see if I can dig it up but for some reason I can't find it at the moment.
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03-03-2006, 03:07 PM #26Originally Posted by Iceaxe
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03-03-2006, 03:18 PM #27
Tom has some real good stuff...... but he doesn't have a TR from the first group. That honor I believe belongs to Dennis Turville and Mike Bogart.
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03-03-2006, 03:46 PM #28
So is this Dennis Turville guy still around? Anyone in the community every talked to him, milked him for stories, etc.?
Seems like i've heard his name as the first descender of Kolob as well.
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03-04-2006, 04:29 PM #29Originally Posted by Iceaxe
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03-04-2006, 09:47 PM #30Originally Posted by rock_ski_cowboy
For part two of your questions check out this post for some interesting info.....
http://uutah.com/forum/viewtopic.php?p=13468
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03-08-2006, 08:28 AM #31Originally Posted by stefan
This photo was taken by Bob Athey from our vantage point above figure 8 hill across from the northwest ridge of wolverine cirque.
you can see where they have patted down a ramp, and the landing is just below where the image cuts off....
just in case you want to gain an appreciation of what it means to be air borne for 3 seconds....
stefan
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