A car, initially at rest, travels 20 m in 4 s along a straight line with constant acceleration. the acceleration of the car is

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A car, initially at rest, travels 20 m in 4 s along a straight line with constant acceleration. the acceleration of the car is

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Gia Bảo 5 years 2021-07-22T16:42:01+00:00 1 Answers 134 views 0

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  1. thienan
    0
    2021-07-22T16:43:59+00:00
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    Answer:acceleration=2.5m/s^2

    Explanation:

    initial velocity(u)=0

    Distance(d)=20m

    Time(t)=4seconds

    Acceleration=a

    D=uxt+(axt^2)/2

    20=0+(ax4^2)/2

    20=(ax4x4)/2

    20=16a/2

    Cross multiplying we get

    20×2=16a

    40=16a

    Divide both sides by 16

    40/16=16a/16

    2.5=a

    Acceleration=2.5m/s^2

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