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Lesson 1.1 Mechanisms Key Terms

Key Terms

AB
ABETThe recognized accreditor for college and university programs in applied science, computing, engineering, and technology.
Actual Mechanical AdvantageThe ratio of the magnitude of the resistance and effort forces applied to a system.
BeltA continuous band of tough flexible material used to transmit motion and power within a pulley system.
CareerA profession for which one trains and which is undertaken as a permanent calling.
ChainA series of usually metal links or rings connected to or fitted into one another and used to transmit motion and power within a sprocket system.
Effort ForceAn external force applied to an object.
EfficiencyThe ratio of useful energy output to the total energy input, or the percentage of the work input that is converted to work output.
FrictionThe resistance that one surface or object encounters when moving over another.
FulcrumThe fixed point around which a lever rotates.
GearA circular toothed object used to transfer rotary motion and torque through interlocking teeth.
Ideal Mechanical AdvantageRatio of distance traveled by the applied effort and resistance force within a system.
Idler GearA gear positioned between the driver and the driven gear used to change rotational direction.
Inclined PlaneA flat surface set at an angle or an incline with no moving parts that is able to lift objects by pushing or pulling the load.
LeverA rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second and turning at a third on a fulcrum.
MechanismThe structure of or the relationship of the parts in a machine, or in a construction or process comparable to a machine.
MomentThe turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.
PitchDistance between adjacent threads in a screw.
PulleyA type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.
Resistance ForceImpeding effect exerted by one material object on another.


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