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

  • question_answer
    Tripling the speed of the motor car multiplies the distance needed for stopping it by                       [NCERT 1978]

    A)                 3             

    B)                 6

    C)                 9             

    D)                 Some other number

    Correct Answer: C

    Solution :

                        \[s\propto {{u}^{2}}\] i.e. if speed becomes three times then distance needed for stopping will be nine times.


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