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Frictionless refers to a situation where there is no resistance or opposition to motion between two surfaces. It means that there are no forces acting against the direction of motion, allowing objects to move smoothly without any loss of energy.
The energy possessed by an object due to its motion.
The principle stating that energy cannot be created or destroyed but only transferred or transformed from one form to another.
Efficiency: The ratio of useful work output to the total work input in a system.