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Details Title: Chapter 2 notes Description: gravity and motion Total Flash Cards: 16 Created: 09/14/2006 14:54:31	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term inertia Definition is the tendancy of a body at rest to stay at rest. and a body in motion to keep moving, in a straight line Term newton's first law of motion Definition a body continues in a state of rest or motion in a straight line at a constant speed unless made to change that state by forces acting on it. Term Accelration Definition any change in speed and direction Term Newton's 2nd law of motion. Definition the amount of acceleration (a) that a force (f) can produce depends on the mass (m) of the object being accelerated. Term Newton's law of gravity Definition Every mass exerts a force on every other mass. the strenght of the force is directly proportional to the product of the masses divided by the square of their seperation. Term Newton's third law of motion Definition when two objects interact they create equal and opposite forces on each other. Term surface gravity Definition measures the gravitional attraction at a planets or star's surface. Term Asterism Definition an easily identified grouping of stars often a part of a larger constellation Term declination Definition line East and West of a star chart Term right ascension Definition "RA" the north and south lines of a star chart. Term alitude Definition is an objects angle above the horizon. Term conjuction Definition when a planet lies in the sky with the direction as the sun. Term inferior conjuction Definition planet lies between us and the sun. Term superior conjuction Definition a planet is on the other side of the sun. Term a transit Definition when a planet moves in front of the sun and is silhoutted by the sun. Term opposition. Definition when a planet is directly opposite the sun in the sky.