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A body of mass 2 kg moving with a speed of 4 m/s. makes an elastic collision with another body at rest and continues to move in the original direction but with one fourth of its initial speed. The speed of the two body centre of mass is `(x)/(10)` m/s. Then the value of x is _____________

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Knowledge Check

  • A body of mass 2 kg makes an elastic head - on collision another body at rest and continues to move in the original direction with one fourth of its original speed . The mass of the second body which collides with the first body is

    A
    `2 kg`
    B
    `1.2 kg`
    C
    `3 kg`
    D
    `1.5 kg`

  • A body of mass 1.0 kg strikes elastically with another body at rest and continues to move in the same direction with one-fourth of its initial velocity. The mass of the other body is

    A
    0.6 kg
    B
    2.4 kg
    C
    3.0 kg
    D
    4.0 kg

  • A body of mass m kg collides elastically with another body at rest and then continues to move in the original direction with one half of its original speed. What is the mass of the target body ?

    A
    m kg
    B
    2/3 m kg
    C
    m/3 kg
    D
    m/2 kg
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