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physics

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the velocity acquired by a body moving with uniform acceleration is 12 m/s2 in 2 secs.and 18 m/s2 in 4 sec. find the initial velocity of the body?

  • physics -

    vf=vi+at

    Hmmm. I am wondering if you meant 12m/s and 18m/s. I will assume so.

    12=vi+2a
    18=vi+4a
    subtract first from second equation
    6=2a a=3 m/s^2

    12=Vi+2*3 solve for vi

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