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18 June, 10:06

How long does it take a car to cross a 30.0 m wide intersection

after the light turns green, if the car accelerates from rest at a

constant 2.00 m/s2.

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Answers (1)
  1. 18 June, 12:35
    0
    5.48s

    Explanation:

    d=30m

    a=2m/s²

    We also have: d=at²/2, from where we get t=sqrt (2d/a).

    t=sqrt (2*30/2) = sqrt (30) = 5.48s
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