This set will cover Abeka Physics Chapter 11: "Work and Machines" (pages 158-171).

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  • work

    term for the transfer of energy from one body to another

    force

    The amount of work accomplished depends on the magnitude of the ____.

    W = Fd and W = Pt

    the basic work equation and the equation for work in terms of power

    scalar quantity

    Is work a vector quantity or a scalar quantity?

    negative work

    A force applied opposite to the motion does _____ ____.

    net work

    term for the algebraic sum of positive work and negative work

    power

    term for the time rate of doing work

    P = W / t

    the equation for average power

    watt

    the SI unit of power

    fulcrum

    term for a point on which a lever pivots freely

    load

    term for an object resting on one end of the lever

    input force

    term for the force applied to a lever

    output force

    term for the force applied to the load by a lever

    input distance

    term for the distance through which the input force acts

    output distance

    term for the distance through which the output force acts

    input lever arm

    term for the distance from the fulcrum to the point of application of the input force

    output lever arm

    term for the distance from the fulcrum to the load

    input work

    term for the work done on a lever

    law of levers

    law that states that the input force times the length of the input lever arm equals the output force times the length of the output lever arm

    mechanical advantage

    term for the ability of a machine to multiply force

    class 1 lever

    type of lever in which the input force and load are located on opposite sides

    class 2 lever

    type of lever in which the input force and the load are located on the same side of the fulcrum

    class 3 lever

    type of lever in which the input force is between the fulcrum and the load

    inclined plane

    simple machine that allows heavy objects to be raised by sliding or rolling them along a slope

    block and tackle

    term for a device that uses several pulleys in combination

    efficiency

    term for the output work divided the input work

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