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Falling with wind resistance.

  1. Nov 17, 2011 #1
    My friends and I were having a discussion about falling and new the whole rate of acceleration and what not, but where unsure how to account for A) wind resistance and B) the act of jumping.

    So assuming that we "jump" from a 7th story building, and assuming that each story is 10 feet, and all other factors are static. Assuming that One "jumps" roughly 8in 20.3cm, how would you go about calculating how fast you would be going when you hit the ground, accounting for wind resistance?
  2. jcsd
  3. Nov 17, 2011 #2
    If you can calculate how fast you would hit the ground from 70 ft, then to account for the "jump" you simply calculate how fast you would hit the ground from 70 ft + jump....which would be 70 ft and 8 in. Not much of a difference (around .2 mph)

    Accounting for air resistance is not as easy because it depends on how you fall (straight as an arrow, flat with arms spread out, countless other positions), and it slows you down as a square function of your speed. However from a 7th story it probably wouldn't make much of a difference as you'd only be going about 45 mph.
  4. Nov 17, 2011 #3


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    No problem if you happen to be a mouse, apparently. Their terminal velocity is very low and they can just walk (/limp?) away after landing.
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