JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Conservation of Energy and Momentum

  • question_answer
    A car travelling at a speed of 30 km/hour is brought to a halt in 8 m by applying brakes. If the same car is travelling at 60 km/hour, it can be brought to a halt with the same braking force in                                    [NCERT 1976]

    A)                 8 m        

    B)                 16 m

    C)                 24 m     

    D)                 32 m

    Correct Answer: D

    Solution :

                        \[s\propto {{u}^{2}}\] i.e. if speed becomes double then stopping distance will become four times i.e.\[8\times 4=32m\]


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