force - a push or pull on an object, newton - unit of force, work - occurs when a force acts on an object to move it a certain distance from its starting point, displacement - the distance an object is moved from its starting point, joule - unit of work, simple machines - basic mechanical devices that change the direction of amount of a force needed to lift a load or do work, mechanical force - force that involve contact with another object, inclined plane - a type of simple machine with a smooth slanted durface, reducing the force needed to do work, pulley system - a type of simple machine with a rope or chain that wraps around a wheel, mechanical advantage - a ration of the resistance force to the effort force, lever - a type of simpel machine with a solid bar that rests on at a fulcrum point, reducing the force needed a lift a load, fulcrum - the point where the lever pivots, class 1 lever - a simple machine where the fulcrum is located between the effort and load, class 2 lever - a simple machine where the fulcrum is located at one end and the effort applied is a the opposite end, class 3 lever - a simple machine where the effort lies in between the load and fulcrum, efficiency - how well the machine converts input energy, work, and power into ourput energy, work, and power,
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unit 2 Force and Work
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