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POE Lesson 1.1
Project Lead The Way, Lesson 1.1 Key Terms and Definitions
Term | Definition |
---|---|
ABET | The recognized accreditor for college and university programs in applied science, computing, engineering, and technology. |
Actual Mechanical Advantage (AMA) | The ratio of magnitude of the resistance and effort forces applied to a system. |
Belt | A continuous band of tough flexible material used to transmit motion and power within a pulley system. |
Career | A profession for which one trains and which is undertaken as a permanent calling. |
Chain | A 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 Force | An external force applied to an object. |
Efficiency | The ratio of useful energy output to the total energy input, or the percentage of the work input that is converted to work output. |
Friction | The resistance that one surface or object encounters when moving over another. |
Fulcrum | The fixed point around which a lever rotates. |
Gear | A circular toothed object used to transfer rotary motion and torque through interlocking teeth. |
Ideal Mechanical Advantage (IMA) | Ratio of distance traveled by the applied effort and resistance force within a system. |
Idler Gear | A gear positioned between the driver and the driven gear used to change rotational direction. |
Inclined Plane | A flat surface seat at an angle or an incline with no moving parts that is able to lift objects by pushing or pulling the load. |
Lever | A 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. |
Mechanism | The structure of or the relationship of the parts in a machine, or in a construction or process comparable to a machine. |
Moment | The 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. |
Pitch | Distance between adjacent threads in a screw. |
Pulley | A 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 force | Impeding effect exerted by one material object on another. |
Screw | An inclined plane wrapped around a cylinder, forming the path and pitch. |
Simple Machine | Any of various elementary mechanisms including the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw. |
Sprocket | A toothed wheel whose teeth engage the links of a chain. |
Static Equilibrium | A condition where there are no net external forces acting upon a particle or rigid body and the body remains at rest or continues at a constant velocity. |
Technical Communication | Creating, designing, and transmitting technical information so that people can understand it easily and use it safely, effectively, and efficiently. |
Torque | A force that produces or tends to produce rotation or torsion. |
Wedge | A substance that tapers to a thin edge and us used for splitting, raising heavy bodies, or for tightening by being driven into something. |
Wheel and Axle | Two different sized circular objects that are attached together and turn as one. |