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Subject: How fast do you fall?

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stonefro2000
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12/17/2006 9:28 PM  
So we are on a flying ship thousands of feet above the ground when the fighter in fullplate falls over board.
 The qustion that soon follows

 How fast do you fall and/or how far do you fall in a round?

I think i read something adressing this, but at the moment I can not recall where.


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gss_000
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12/17/2006 9:58 PM  
I use page 20 of the DMG, under flying creatures not maintaining their forward momentum that need to. The first round you fall 150 feet. The next round, and every round afterward you fall 300 feet.

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Zoons
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12/18/2006 9:06 AM  
Or you could look up "Terminal Velocity" in a physics journal or probably Wikpedia. Then, applying the 9.8 m/s^2 gravity (assuming Faerun has earth-like gravity) and figure the average velocity during any 6 second interval while approaching "Terminal Velocity". That Dwarf is toast.

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Vrecknidj
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12/19/2006 4:18 PM  
According to Wikipedia, free fall usually reaches a terminal velocity of about 120 miles per hour, that's 176 feet per second. So, that's 1056 feet in a round. If a creature is falling at 150 feet per round, that's a lot slower than terminal velocity. Even 300 feet in a round is nothing.

Then again, a body doesn't reach terminal velocity all that quickly. Going back to physics, an object that starts falling with zero velocity, it travels a distance equal to one-half the acceleration of gravity times the square of the time it falls.

So, 1000 feet = 1/2 * 32 ft/s/s * time * time

Time = Square root (2000/32) = 8 seconds.

So someone can fall a thousand feet in about a round and a half?

Did I make an error somewhere?

Dave

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gss_000
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12/19/2006 6:07 PM  
As far as I can remember, you are correct. But this is where I think realism has to take a back seat to mechanics. Since this is an adventure game, realism would mean no one could swoop down and save someone unless you're Superman. I'd want to give players a chance to save the day and ignore physics.

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Vrecknidj
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12/20/2006 6:45 AM  
Posted By gss_000 on 12/19/2006 6:07 PM
As far as I can remember, you are correct. But this is where I think realism has to take a back seat to mechanics. Since this is an adventure game, realism would mean no one could swoop down and save someone unless you're Superman. I'd want to give players a chance to save the day and ignore physics.
Agreed.  If James Bond can do it, or Indiana Jones can do it, then a PC should be able to do it.  Physics ought to take a back seat to a cool story.

Dave


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jacksonm
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12/20/2006 7:14 AM  
Whenever you see something like that a Wizard did it.

nyjastul69
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12/20/2006 7:23 AM  
To quote V from OotS: "I am somewhat preoccupied telling the Laws of Physics to shut up and sit down.


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jgsugden
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12/20/2006 11:48 AM  
I did the math once and decided the following worked pretty well to approximate reality: "You can fall 500 feet in the 1st round, and 1000 feet in each round following the first." It is a bit simplified, but it is close enough - and is really simple to implement.  However, it does create some funky issues for spellcasting when you consider high level spellcasters tossing off spells at range ... how much faster than terminal velocity does a high level extended spell (travelling over 3000 feet instantaneously/in a round) go?

I find the bigger issues to involve timing:

A party of PCs is fighting a pair of giants with the awesome blow feat at the top of a 450 foot cliff.  The initiative order has PC 1 (fighter) going at 22, the giant next at 18, and then the other 3 PCs going at 17 (cleric), 16 (wizard) and 15 (rogue).  The fighter attacks the giants and misses.  The giants attack the fighter and rogue using awesome blow and send them off the cliff.Â

Question 1: When do the PCs start falling?  Right away?  During their movement?  Should this movement be treated like a bull rush (all during the opponent's turn)?

Question 2: Do they fall 'all at once' , or should I spread it out?  If the wizard or cleric has a transposition spell, how do I determine if the falling PC is out of range?Â

I've decided, in the past, to give the PCs all benefit of the doubt in this area, but it has created some tricky issues.

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