FRICTION, A force that opposes motion when two surfaces rub together., PRESSURE, The force exerted over a given area., RESISTANCE, The opposition to the flow of electric current., CONDUCTOR, A material that allows electric current to pass through it easily., ACCELERATION, The rate at which an object's velocity changes., IMPACT, A collision or forceful contact between objects., GROUNDING, A safety practice that provides a path for unwanted electrical current to flow safely into the ground., VOLTAGE, The electrical potential difference that drives current through a circuit., MACHINE, A device that makes work easier., EFFICIENCY, How effectively a machine converts input energy into useful output., WEDGE, A simple machine used for cutting, splitting, or separating objects., PULLEY, A wheel with a groove that helps lift or move objects using a rope., BUOYANCY, The upward force exerted by a fluid on an object., SCREW, An inclined plane wrapped around a cylinder., CURRENT, The flow of electric charge.

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