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    Question

    When the speed of car is doubled, then what will be the

    braking force of the car to stop it in the same distance?
    A four times Correct Answer Incorrect Answer
    B two times Correct Answer Incorrect Answer
    C half Correct Answer Incorrect Answer
    D one-fourth Correct Answer Incorrect Answer

    Solution

    Brake force, also known as Brake Power, is a measure of braking power of a vehicle. Suppose a car whose mass is 'x' and is braked from a speed of y km/hr to come to halt at a uniform retardation in z min. If the speed of the car is doubled in the same distance, then the braking force required to stop the car is four times the original speed i.e. '4v'. Note that all the parameters remain to be same.

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