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A bullet of mass 0.2 kg …

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A bullet of mass 0.2 kg is fired from the gun with the mass of 2 kg if the velocity of the bullet is 150 metre per second then what is the total momentum of the gun and Bullet before firing and after firing .

    • Posted by Pradeep Mehta 5 years, 3 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 3 months ago

    Let the recoil velocity of gun be V.

    Mass of gun Mgun​=2.0 kg     

    Mass of bullet  Mbullet​=0.2 kg

    Velocity of bullet  Vbullet​=150 m/s

    Initial momentum of the system   Pi​=0

    Applying the conservation of linear momentum :   Pf​=Pi​

    Or    Mgun​V+Mbullet​Vbullet​=0

    Or    2×V+0.2×150=0

    2v +30=0
    2v = -30

    ⟹ V=−15 m/s

    0Thank You

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