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Posers and Puzzles

Posers and Puzzles

  1. 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 member talzamir
    Art, not a Toil
    05 Nov '11 14:34
    A little under 12 seconds?
  3. Subscriber joe shmo
    Strange Egg
    05 Nov '11 15:19 / 1 edit
    I get about 11.8 s

    So that makes two of us
  4. 05 Nov '11 22:21
    While we are no the subject, this is an interesting watch: