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3 April, 10:08

6. Your friend says that when a car goes twice as fast, the braking distance

doubles. Do you agree or disagree? Use evidence from this investigation

to support your ideas.

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Answers (1)
  1. 3 April, 13:53
    0
    Disagree, when the speed of the car doubles the braking distance quadruples. This is because coming to a stop means removing all the kinetic energy from the car, the work needed to stop the car would then be proportional to the velocity of the car.

    Explanation:

    The braking distance of a car is how long it takes to completely stop.

    The braking distance of the car is proportional to the square of its velocity.

    If you were to double the speed then you'd have to multiply the speed times four. Therefore, the braking distance quadruples.

    speed * 2 = braking distance * 4
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