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Math Help - Another Physics problem

  1. #1
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    Another Physics problem

    A car initially traveling westward at 20 m/s has a constant acceleration of 1 m/s^2 eastward. How far does the car travel in the first 10 s?

    Help!!!!
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    MHF Contributor MarkFL's Avatar
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    Re: Another Physics problem

    Hint: x(t)=\frac{1}{2}at^2+v_0t
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    Re: Another Physics problem

    After 10 seconds, the speed of the car is v = u + at = 20 + (-1)*10 = 10 m/s

    The distance travelled is S = 1/2 * (u + v) * t = 0.5*(20+10)*10 = 150 m
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    Re: Another Physics problem

    Hey LOL is this right? I did mines a different way
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    MHF Contributor MarkFL's Avatar
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    Re: Another Physics problem

    Yes, the kinematic equation I cited returns the same value:

    x(10)=\frac{1}{2}(-1)(10)^2+20(t)=-50+200=150
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