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The Concept Map you are trying to access has information related to:
Force to overcome Friction, Force can be move with Gears, Force can be move with Belts, Friction is Greater when things drag, Friction is Less when things role, Force can be Measured, Friction occurs when Things rub together, Gears used in Machines, Belts used in Machines, Less when things role may be On wheels, Less when things role may be On rollers, Measured with a Spring scale, On wheels used in Machines, Moving things requires Force, On rollers used in Machines