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Force & Motion
Force & Motion Vocab Review
| Question | Answer |
|---|---|
| lever | a simple machine consisting of a rigid bar that rests and pivots around a support |
| force | a push or a pull |
| gear | a wheel with teeth evenly spaced around the rim |
| axle | a shaft inserted into the middle of a wheel |
| effort | the force needed to move a load |
| wheel & axle | a simple machine consisting of a wheel to which an axle has been attached |
| fulcrum | the support around which a lever arm pivots |
| load | an object that requires force to be moved over a distance |
| inclined plane | a simple machine that consists of a flat surface that slants or slopes; also called a ramp |
| simple machine | a machine with one (or no) moving part that makes it easier to do work |
| friction | the resistance to motion that occurs whenever the surfaces of two objects rub against each other |
| work | force applied to a load or object that results in the object moving a distance |
| pulley | a simple machine that consists of a grooved wheel that spins around a stationary axle; the outer rim of the wheel is grooved to accommodate a rope or chain |
| tradeoff | the exchange of one thing in return for another; simple machines exchange force for distance |
| wedge | a simple machine that consists of a moving inclined plane |
| wheel | any circular object that turns around a center point or axis |