CPS4 - Chapter 4
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Created by:
usscience11 on April 21, 2010
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9 terms
Terms | Definitions |
|---|---|
 inverse-square law | The intensity of an effect from a localized source spreads uniformly throughout the surrounding space and weakens with the inverse square of the distance. |
| weight | the force that an object exerts on a supporting surface (or, if suspended, on a supporting string), which is often, but not always, due to the force of gravity. |
| weightless | having little or no weight or apparent gravitational pull |
| Law of universal gravitation | Every body in the universe attracts every other body with a force that, for two bodies, is directly proportional to the product of their masses and inversely proportional to the square of the distance separating them. |
| Projectile | Any object that moves through the air or space under the influence of gravity |
| Parabola | The curved path followed by a projectile under the influence of constant gravity only. |
| Satellite | A projectile or small celestial body that orbits a larger celestial body. |
| Ellipse | The oval path followed by a satellite |
| Escape Speed | The speed that a projectile, space probe, or similar object must reach to escape the gravitational influence of Earth or of another celestial body to which it is attracted. |
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