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When a ball is thrown upwards, its momen...

When a ball is thrown upwards, its momentum first decreases and then increases. Is conservation of linear momentum violated in this process?

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No, the momentum conservation principle is not violated. Infact, this principle cannot be applied to this case as external force due to gravity is involved.
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Knowledge Check

  • Principle of conservation of linear momentum is deduced from

    A
    Newton's 1st law
    B
    Newton's 2nd law
    C
    Newton's 3rd law
    D
    none of the above.

  • The linear momentum is conserved in

    A
    elastic collisions
    B
    inelastic collisions
    C
    Both a and B
    D
    Neither a nor b

  • The condition for validity of the principle of conservation of linear momentum is :

    A
    external force should be acting on any one body
    B
    external force should be aacting on both the bodies
    C
    no external unbalanced force should act on the system
    D
    none of these

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    A when a diver dives, the rotational kinetic energy of diver increases, during several somersaults. When diver pulls his limbs, the moment of inertia decreases and on account of conservation of angular momentum his angular speed increases.

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