2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. NLM, Friction, Circular Motion

JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Critical Thinking Questions

  • question_answer
    Consider the following statement: When jumping from some height, you should bend your knees as you come to rest, instead of keeping your legs stiff. Which of the following relations can be useful in explaining the statement [AMU (Engg.) 2001]

    A) \[\Delta \overrightarrow{{{P}_{1}}}=-\Delta \overrightarrow{{{P}_{2}}}\]

    B)   \[\Delta E=-\Delta (PE+KE)=0\]

    C) \[\overrightarrow{F}\Delta t=m\Delta \overrightarrow{v}\]

    D) \[\Delta \overrightarrow{x}\propto \Delta \overrightarrow{F}\]             Where symbols have their usual meaning

    Correct Answer: C

    Solution :

        \[\overrightarrow{F}\Delta t=m\Delta \overrightarrow{v}\]Þ \[F=\frac{m\Delta \overrightarrow{v}}{t}\]             By doing so time of change in momentum increases and impulsive force on knees decreases.


You need to login to perform this action.
You will be redirected in 3 sec spinner