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Chapter 3 Vocabulary
Work & Power
| Term 1 | Definition 1 | Term 2 | Definition 2 |
|---|---|---|---|
| Work | Measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. | Wheel And Axle | A type of simple machine used to make tasks easier in terms of manipulating force by applying the concept of mechanical advantage. |
| Power | Time rate of doing work or delivering energy, expressible as the amount of work done W, or energy transferred, divided by the time interval t—or W/t. | Inclined Plane | Simple machine consisting of a sloping surface, used for raising heavy bodies. |
| Mechanical Advantage | The ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine. | Wedge | A simple machine that consists of two inclined planes, giving it a thin end and thick end |
| Efficiency | A comparison of the energy output to the energy input in a given system. | Screw | A simple machine consisting of a twisted inclined plane wrapped around a cylinder in ridges. |
| Simple Machine | Any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work. | Pulley | A wheel that carries a flexible rope, cord, cable, chain, or belt on its rim. |
| Lever | A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. | ||
| Fulcrum | The support, or point of rest, on which a lever turns in moving a body. |
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