Posers and Puzzles

Posers and Puzzles

  1. Joined
    18 Jun '11
    Moves
    1179
    05 Nov '11 05:03
    Since raindrops grow as they fall, their surface area increases and therefore the resistance to their falling increases. A raindrop has an initial downward velocity of 10 m/s and its downward acceleration is portrayed by the equation
    a=9-.9t when 0<t<10
    a=0 when t>10

    If the raindrop is initially 500 m above the ground, how long does it take to reach the ground?
  2. Standard membertalzamir
    Art, not a Toil
    60.13N / 25.01E
    Joined
    19 Sep '11
    Moves
    46223
    05 Nov '11 14:34
    Reveal Hidden Content
    A little under 12 seconds?
  3. Subscriberjoe shmo
    Strange Egg
    podunk, PA
    Joined
    10 Dec '06
    Moves
    7733
    05 Nov '11 15:191 edit
    I get about 11.8 s

    So that makes two of us
  4. .
    Joined
    06 Feb '10
    Moves
    6916
    05 Nov '11 22:21
    While we are no the subject, this is an interesting watch:
    YouTube
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