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Math Help - Constant Acceleration

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    Constant Acceleration

    What constant acceleration is required to increase the speed of a car from 30 mi/hr to 50 mi/hr in 5 seconds?
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  2. #2
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by jkeatin View Post
    What constant acceleration is required to increase the speed of a car from 30 mi/hr to 50 mi/hr in 5 seconds?
    Since v_f=50\frac{\text{mi}}{\text{hr}} and v_i=30\frac{\text{mi}}{\text{hr}}, then

    a=\frac{\Delta v}{\Delta t}=\frac{50\frac{\text{mi}}{\text{hr}}-30\frac{\text{mi}}{\text{hr}}}{5\text{ sec}-0\text{ sec}}\approx {\color{red}\boxed{0.001\frac{\text{mi}}{\text{s}^  2}}}\approx \color{red}\boxed{1.788\frac{\text{m}}{\text{s}^2}  }

    I hope that this makes sense!

    --Chris
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