Lesson 1.1 Mechanisms
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Created by:
mpyle on August 27, 2010
Subjects:
Classes:
LTHS POE Hollenberger, Mechanical Engineering and Machines Building, SGHS POE
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25 terms
Terms | Definitions |
|---|---|
 ABET | The recognized accreditor for college and university programs in applied science, computing, engineering, and technology. |
| Actual Mechanical Advantage | The ratio of the 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 | 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 set 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. |
| Torque | A force that produces or tends to produce rotation or torsion. |
| Wedge | A substance that tapers to a thin edge and is 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. |
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