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5 September, 20:00

A car starts from rest and travels a distance of 150 m in 15 s with a constant acceleration what is the velocity of the car after 15 s?

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  1. 5 September, 21:05
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    Here, we have

    d = 150m, t = 15s, V0 = zero, acc. is constant

    he wants Vf (final velocity) after 15s

    we will use to 2 equations from the kinametics equation

    the first one to get the acc. which is d = v0*t+0.5*a*t^2

    v0=zero then d = 0.5*a*t^2

    then a = 2*d / (t^2) = 4/3 m/s^2

    we have the acceleration now so we can get the V through this Equation

    V=v0+a*t

    0 + 4/3 * 15 = 20 m/s
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