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The Historical Developement of The Concept of The Gravitational Force
Transcript of The Historical Developement of The Concept of The Gravitational Force
M1 = 7.35 x 1022 kg
M2 = 6 x 1024 kgG = 6.67 x 10-11 N
r = 3.844 x 108 m
F = (7.35 x 1022)(6 x 1024)(6.67 x 10-11 )/(3.844 x 108 )2
F = 1.99 N The experiment was performed in 1797–98 by the English scientist Henry Cavendish. He followed a method prescribed and used apparatus built by his countryman, the geologist John Michell, who had died in 1793. The apparatus employed was a torsion balance, essentially a stretched wire supporting spherical weights. Attraction between pairs of weights caused the wire to twist slightly. The experiment was popularly known as weighing the Earth because determination of G permitted calculation of the Earth’s mass. Gravity is the negative slope in the space-time fabric. Einstein tells us that all gravitational forces correspond to a bending of space time; the "twist" is gravitomagnetism. The force of gravity is directly dependent on the mass of the 2 objects, therefore light could not be bent by gravity. What is the Schwarzschild radius? The Schwarzschild radius is the radius of an object or planet that when crushed, becomes a black hole. For example, if the sun was crushed to 2.5km, it would then become a black hole, with 2.5km being the Schwarzschild radius. General Relativity When Einstein devised his theory, he had three experiments in mind to test its predictions. One was the gravitational bending of starlight around the sun.
The second prediction is the precession of planetary orbits about the sun.
The third experimentally verified prediction is the slowing down of time due to gravity. Serina Smith Jh'on West Jahnaya Clarke Destiny Blair Dana Buonya Jh'on West Sarah Wynn Jahnaya Clarke Serina Smith