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30 July, 06:21

Part A Which of the following statements is/are true? Check all that apply.

(A) The SI unit of power is the watt. Power is the rate at which work is done.

(B) A person is limited in the total work he or she can do by the rate at which energy can be transformed.

(C) Power is the rate at which energy is transformed.

(D) A person is limited in the total work he or she can do only by the total energy required.

(E) The SI unit of power is the horsepower.

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  1. 30 July, 08:50
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    A) True

    C) True

    D) True

    Explanation:

    As we know that power is the rate at which work is done.

    We know that mechanical work w given as

    w = ∫F. ds

    F=Force

    ds = Elemental displacement

    So power P = F. V

    V=Velocity

    F=Force

    The unit of power in SI unit is Watt or joule per second (J/s). But on the other hand the unit of power in English system is horsepower.

    The is also can be defined as the rate at which energy is transformed.

    Following option are corrects

    A) True

    C) True

    D) True
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