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9th Class Science Force and laws of motion Question Bank Force and Laws of Motion

  • question_answer
    Two perfectly elastic particles A and B of equal masses travelling along the line joining them with velocity 15 m/s and 10 m/s respectively collide. Their velocities after the elastic collision will be (in m/s) respectively

    A)  0 and 25             

    B)  5 and 20

    C)  10 and 15          

    D)         20 and 5

    Correct Answer: C

    Solution :

     For equal masses, the velocities always gets exchanged.


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