Gravity
Gravity
Kepler's Laws of Planetary Motion:
1] Each planet moves in an elliptical orbit with the sun at one focus
2] The line form the sun to any planet sweeps out equal areas of space in equal time intervals
3] The squares of the times of revolution (days, months or years) of the planets are proportional to the cubes of their average distances from the sun.
Law of Universal Gravitation: Every mass in the universe attracts every other mass with a force that for two masses is directly proportional to the product of their masses and inversely proportional to the square of the distance separating them
F = (G(m1*m2))/d^2
Inverse-Square Law: A law relating the intensity of an effect to the inverse square of the distance from the cause. Intensity ~ 1/distance`2
Gravity follows an inverse-square law, as do the effects of electric, magnetic, light, sound, and radiation phenomena
Weightlessness:condition wherein gravitational pull appears to be A lacking.
Spring Tide: A high or low tide that occurs when the sun, earth, and 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 Tide: A tide that occurs when the moon is midway between new and full, in either direction. Tides due to the sun and moon partly cancel, making the high tides lower and the low tides higher than average.
Gravitational Field: The space surrounding a massive body in which another mass experiences a force of attraction
Black Hole: The configuration of a massive star that has undergone gravitational collapse, in which gravitation at the surface is so intense that even the star's own light cannot escape.
Big Bang: The primordial explosion that is thought to have resulted in the expanding universe
Stability: In order for an object to be stable, its center of gravity must lie directly above a point of support
The state of motion of the center of mass in a system can only be changed by forces outside the system
Escape Speed: That speed which is sufficient to propel an object away from a planet, or any object
Tides: Tides are caused by the variation of force on the earth exerted by the moon (and the sun)
The effect of the moon is about 4 times greater than that of the sun.
Kepler's Laws of Planetary Motion:
1] Each planet moves in an elliptical orbit with the sun at one focus
2] The line form the sun to any planet sweeps out equal areas of space in equal time intervals
3] The squares of the times of revolution (days, months or years) of the planets are proportional to the cubes of their average distances from the sun.
Law of Universal Gravitation: Every mass in the universe attracts every other mass with a force that for two masses is directly proportional to the product of their masses and inversely proportional to the square of the distance separating them
F = (G(m1*m2))/d^2
Inverse-Square Law: A law relating the intensity of an effect to the inverse square of the distance from the cause. Intensity ~ 1/distance`2
Gravity follows an inverse-square law, as do the effects of electric, magnetic, light, sound, and radiation phenomena
Weightlessness:condition wherein gravitational pull appears to be A lacking.
Spring Tide: A high or low tide that occurs when the sun, earth, and 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 Tide: A tide that occurs when the moon is midway between new and full, in either direction. Tides due to the sun and moon partly cancel, making the high tides lower and the low tides higher than average.
Gravitational Field: The space surrounding a massive body in which another mass experiences a force of attraction
Black Hole: The configuration of a massive star that has undergone gravitational collapse, in which gravitation at the surface is so intense that even the star's own light cannot escape.
Big Bang: The primordial explosion that is thought to have resulted in the expanding universe
Stability: In order for an object to be stable, its center of gravity must lie directly above a point of support
The state of motion of the center of mass in a system can only be changed by forces outside the system
Escape Speed: That speed which is sufficient to propel an object away from a planet, or any object
Tides: Tides are caused by the variation of force on the earth exerted by the moon (and the sun)
The effect of the moon is about 4 times greater than that of the sun.
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