Motion - an object’s change of position compared to another, Work - force exerted on an object that causes it to move, Power - the rate at which work is done or rate at which energy changes form, Joule - unit of work equal to one newton-meter, Horsepower - unit of power equal to 746 watts, Machine - a device that changes the amount of force or distance over which force is exerted and/or the direction in which force is exerted, Simple Machine - unpowered device that moves one load, or accomplishes a task with one movement, Mechanical Advantage - number of times a machine increases a force exerted on an object; ratio of output force divided by input force, Efficiency - the percentage of input work that is converted to output work, System - a group of related parts that work together,

Work and Power

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