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ch. 11 les. 3 & 4
Work & Energy and Simple Machines
answer | question |
---|---|
work | the use of force to move an object a certain distance of change an object |
energy | the ability to preform work or change an object |
potential energy | energy stored in the position or the structure of an object |
kinetic energy | the energy of a moving object |
law of conservation of energy | the theory that states that energy may change form, but it cannot be created or deystryed |
simple machines | a machine that changes the direction , the distance, or the strength of one force |
effort | the force applied to a machine |
load | the object being moved by a machine |
fulcrum | the pivot point of a lever |
compound machines | a combination of two or more simple machines |
efficiency | the measure of how much useful work a machine puts out compared to the amount of work put into it |