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GRAVITATION - Coggle Diagram
GRAVITATION
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KEPLER'S LAW
Kepler's First Law
- Any object bound to another by a force that varies as 1/r^2 will move in an elliptical orbit.
- Plants move on elliptical path(orbit) with the s
Kepler's Second Law
- a line drawn from the Sun to any planet sweeps put equal areas in equal time intervals.
Kepler's Third Law
- the squares of the orbital periods of the planets are directly proportional to the cubes of the semi-major axes of their orbits. Kepler's Third Law implies that the period for a planet to orbit the Sun increases rapidly with the radius of its orbit.
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HENRY CAVENDISH
- Cavendish experiment, measurement of the force of gravitational attraction between pairs of lead spheres, which allows the calculation of the value of the gravitational constant, G. In Newton’s law of universal gravitation,
- the attractive force between two objects (F) is equal to G times the product of their masses (m1m2) divided by the square of the distance between them (r2); that is, F = Gm1m2/r2.
- The experiment was performed in 1797–98 by the English scientist Henry Cavendish. He followed a method prescribed, and used an apparatus built, by his countryman the geologist and astronomer John Michell, who had died in 1793.
RELATION BETWEEN G AND g
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- g is the acceleration due to the gravity measured in m/s2.
- G is the universal gravitational constant measured in Nm2/kg2.
ESCAPE VELOCITY
- minimum velocity for a body to escape completely from the gravitational pull of the earth.
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