astro102711 - Astronomy October 27th, 2011 Newton's...

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Astronomy October 27 th , 2011 Newton's Universal Law of Gravitation Between every two objects, there is an attractive force, the magnitude of which is directly proportional to the mass of each object and inversely proportional to the square of the distance between the centers of the objects. F g = G M 1 M 2 d 2 Clicker Question Two equal masses separated by distance d exert a force F on each other due to gravity. How large would the gravitational attraction be if the distance between them was doubled? ¼ F. If the Sun suddenly collapsed into a black hole with the same mass but 10 times smaller diameter, how would the Earth's orbit change? Nothing would change. Newton's Laws of Motion 1. Without a force acting on it, an object moves with constant velocity. > Objects in motion tend to remain in motion, and objects at rest tend to remain at rest. 2. The change in a body's velocity due to an applied force is in the same direction as the force and proportional to it, but is inversely proportional to the body's mass. > In other words, F = ma .
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astro102711 - Astronomy October 27th, 2011 Newton's...

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