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Gullett-Phys-Ch9

Physics - Chapter 9 - Gravity

TermDefinition
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 inversley proportional to the square of the distance separating them
Inverse-square law A law relating the intensity of an effect to the inverse square of the distance from the cause. Gravity follows an inverse-square law.
weight the force that an object exerts on a supporting surface which is often, but not always, due to the force of gravity
weightlessness being without a support force, as in free fall
spring tides high or low tides that occur when the Sun, Earth, and the Moon are all lined up so that the tides due to the Sun and Moon coincide, making the high tides higher than average and the low tides lower than average
neap tides tides that occur when the Moon is midway between new and full, in either direction. Times due to the Sun and Mood partly cancel, making the high tides lower than aveage and the low tides higher than average
gravitational field the influence that a massive body extends into the space around inself, producing a force on another massive body.
Black hole A concentration of mass resulting from graviational collapse, near which gravity is so internse that not even light can escape
Created by: lpgullett