On 2/12/2010 9:48 AM, Sandy Harris wrote:
On 2/12/10, Walter Hamler<[email protected]> wrote:
Is 12 stories far enough to reach terminal velocity?
My back-of-the envelope math says no:
12 stories, say 12 feet/storey as a round number. 144 feet.
s = 16 t**2, so t**2 = 9, t = 3, a 3 second fall
v = 32 t so it is doing 96 feet/second when it hits, about
65 miles an hour.
I've seen a pedestrian (~120lb woman), thrown about ~15 feet into the
air and about 25 feet after being hit by a car doing about 45mph. I
expect that 65 mph is more than enough to do that kind of damage to a
Bronica....
(For those interested, the woman survived with only a broken arm, broken
leg and a few cuts and abrasions. The Driver attempted to run, the bad
news for him was that the incident happened within full view of; a
mounted officer, a pair of foot patrol officers, a bike patrol officer
and a pair of cops in a cruiser, he didn't get far).
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