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| in a machine, the ratio of useful energy out-put to total energy input. |
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| the property of an object or a system that enables it to do work. |
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| the pivot point of a lever. |
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| the SI unit of work and all other forms of energy. one joule of work is done when a force of one newton is exerted on an object moved one meter in the direction of the force. |
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| energy of motion, equal to half the mass multiplied the speed squared. |
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| law of conservation of energy |
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Definition
| energy cannot be created nor destroyed. it may be transformed from one form to another. |
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| a simple machine made of a bar that turns to a fixed point. |
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| a device for increasing a force or simply changing the direction of the force. |
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| the ratio of output force to input force for a machine. |
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| the energy due to the position or the movement of something . |
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| energy of position usually related to relative position of two things. |
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| rate at which work is done or energy is transformed. |
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| a type of lever that is a wheel with a groove in its rim which is used to change the direction of force exerted by rope or cable. |
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| the SI unit of power, one watt expended when one joule is done. |
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| the product of force of an object that is moved. |
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Definition
| theorem states that whenever work is done energy changes. |
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