a car accelerates from rest at 3 m / s^2 along a straight road. how far has the car travelled after 4 s

Question

a car accelerates from rest at 3 m / s^2 along a straight road. how far has the car travelled after 4 s

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Ngọc Khuê 3 months 2021-08-12T23:02:53+00:00 1 Answers 0 views 0

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    2021-08-12T23:04:25+00:00

    Answer:

    24 m

    Explanation:

    The motion of the car is a uniformly accelerated motion (=at constant acceleration), therefore we  can find the distance covered by using the following suvat equation:

    s=ut+\frac{1}{2}at^2

    where

    s is the distance covered

    u is the initial velocity

    t is the time elapsed

    a is the acceleration

    For the car in this problem:

    u = 0, since the car starts from rest

    a=3 m/s^2 is the acceleration

    t = 4 s is the time elapsed

    Therefore, the distance covered is:

    s=0+\frac{1}{2}(3)(4)^2=24 m

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