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Define the terms deforming force, elast...

Define the terms deforming force, elasticity and plasticity. What are perfectly elastic and perfectly plastic bodies ? Give Examples.

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Knowledge Check

  • In perfectly elastic collision

    A
    Only momentum is conserved
    B
    Momentum and kinetic energy both are conserved
    C
    Neither momentum nor kinetic energy is conserved
    D
    Only kinetic energy is conserved.

  • For perfectly elastic collision

    A
    `v_(2)-v_(1)=u_(2)-u_(1)`
    B
    `v_(1)-v_(2)=u_(1)-u_(2)`
    C
    `v_(2)-v_(1)=u_(1)-u_(2)`
    D
    `v_(2)-v_(1)=(u_(1)+u_(2))/(2)`

  • In a perfectly elastic collision between two bodies

    A
    Kinetic energy of the system remains constant .
    B
    Mechanical energy of the system remains constant .
    C
    Kinetic energy first decreases and then ncreases .
    D
    Kinetic energy before collision is equal to kinetic energy after collision .

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