2. Solved Papers
  3. AIIMS

AIIMS AIIMS Solved Paper-2000

  • question_answer
    A bullet of mass 10 g leaves a rifle at an initial velocity of 1000 m/s and strikes the earth at the same level with a velocity of 500 m/s. The work in overcoming the resistance of air will be:

    A) 500 J      

    B)                        5000 J   

    C)                        3750 J                   

    D)         475 J  

    Correct Answer: C

    Solution :

                    Key Idea: Work done in overcoming the resistance of air is equal to change in kinetic energy. Kinetic energy acquired by the body of mass m due to velocity v is                 \[{{E}_{q}}=2{{E}_{a}}\] Change in kinetic energy \[{{E}_{a}}=2{{E}_{q}}\] \[{{E}_{q}}=3{{E}_{a}}\] \[I-D,II-C,III-A,IV-B\] \[I-C,II-D,III-A,IV-B\] This change in kinetic energy is equal to the work done in overcoming the resistance.


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