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Lift an object up from the ground. Work ...

Lift an object up from the ground. Work done by the force exerted by you on the object moves it in upward direction. Thus the force applied is in the direction of displacement. However there exists a force of gravitation on the object at the same time • Which one of these forces is doing positive work? • Which one is doing negative work? • Give reasons

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Knowledge Check

  • The amount of work done by centripetal force on the object moving in a circular path is

    A
    zero
    B
    infinity
    C
    positive
    D
    negative

  • If the force and the displacement are in the same direction, then the work done is:

    A
    F.S
    B
    `-F.S`
    C
    0
    D
    `F//S`

  • If the force and the displacement are in the same direction, then the work done is:

    A
    F.S
    B
    `-F.S`
    C
    0
    D
    `F//S`

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    A force F is applied on a block of mass M . The block is displaced through a distance d in the direction of the force. What is the work done by the force on the block? Does the internal energy change because of this work?

    The work done by a force on the object is equal to the change in its Kinetic. This is called __________

    When a body moves on a horizontal direction the amount of work done by the gravitatioal force is

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