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Explain what is meant by work. Obtain an...

Explain what is meant by work. Obtain an expression for work done by a constant force.

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Knowledge Check

  • Work done by a spning force is

    A
    Always negative
    B
    Always positive
    C
    Always zero
    D
    may be positive and negative

  • Work done by a frictional force is

    A
    negative
    B
    positive
    C
    zero
    D
    all of the above

  • Work done by frictional force

    A
    Is always negative
    B
    Is always positive
    C
    Is zero
    D
    May be positive, negative or zero

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    How is work done by a force meaured ?

    When is work done by a force zero ?

    When is work done by a force postivie ?

    the work done by applied force is

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