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    Question

    A car when passes through a convex bridge exerts a force

    on it which is equal to-
    A mv2/R Correct Answer Incorrect Answer
    B mg + mv2/R Correct Answer Incorrect Answer
    C mg - mv2/R Correct Answer Incorrect Answer
    D none of these Correct Answer Incorrect Answer

    Solution

    Suppose that the body exerts a force N on the surface when it travels through the convex surface. The forces on the car is mg downwards and N upwards. Hence the total force mg−N will provide the essential centripetal acceleration to the car. ⇒ mg - N = mv2/R ⇒ N= mg- mv2/R

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