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Thread: Hard - form simutaneous equation

  1. #1
    Junior Member
    May 2010

    Hard - form simutaneous equation

    This one has had me stumped for a few days now. Hope someone can help shed some light on this question.

    1) For a body travelling with constant acceleration of a meters/second^2 its velocity Vm/sec after t seconds is given by V=u+at where u is its initial velocity.

    After six seconds the body had a velocity of 30 metres per second. 10 seconds later its velocity V was 70m/sec.

    Form a pair of simultaneous equations and solve them to find:
    a) the acceleration
    b) the intial velocity
    c) the velocity after 20 seconds
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  2. #2
    Super Member Random Variable's Avatar
    May 2009
    $\displaystyle 30 = u + 6a $

    $\displaystyle 70 = 30 + 10 a $
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