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Math Help - A paratic is moving

  1. #1
    Senior Member
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    A paratic is moving

    A particle is moving with a velocity of 60.0 m/s in positive x direction at t= 0 and t = 15.0 s the velcity decreases uniformly to zero . What was the acceleration during this 15.0-s interval ? what is the significance of the sign of your answer ?


    my answer is

    Vo = 0
    a = 60 - 0 / 15 = 4
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  2. #2
    MHF Contributor Unknown008's Avatar
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    Mauritius
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    Actually, the particle has a negative acceleration, and hence, you should do (0-60)/15 = -4 m/s^2
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