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When you lift a box from the floor and p...

When you lift a box from the floor and put it one an almirah the ptotential energy of the box increases, but thre is no change in its kinetic energy. Is it a violation of consevation of energy?

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Knowledge Check

  • The total work done on a particle is equal to the change in its kinetic energy

    A
    always
    B
    only if the forces acting on ilt are conservative
    C
    only if gravitational force alone acts on it
    D
    only if elastic force alone acts on it

  • If the speed of body is halved, what will be the change in its kinetic energy?

    A
    1/4 times
    B
    1/6 times
    C
    1/8 times
    D
    1/10 times

  • If the momentum of a body is increased by 50%, then the percentage increase in its kinetic energy is

    A
    0.5
    B
    1
    C
    1.25
    D
    2

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