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Math Help - physics relation

  1. #1
    Newbie
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    Aug 2008
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    physics relation

    derive a theoretical relation between g and D assuming air friction is f = -bv

    Hints: mg(t) = mg - bv(t) Newton's Law
    g(t) = dv(t) / dt Definition of Acceleratioin
    D(t) = integral from t to 0 of v(r)d(r) based on Definition of velocity
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  2. #2
    Junior Member
    Joined
    Jan 2009
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    Use the chain rule:
    dr=(dr/dt)dt=vdt

    Use newton's law to find what is v in regards with g(t), and then plug it instead of v to find the relation between D and g.
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