UNIVERSE
SOLAR SYSTEM FORMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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planets and the sun in motion around each other
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earth and its moon in motion around the Sun
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Earth and stars in motion around the Sun
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None of the above
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Detailed explanation-1: -Isaac Newton demonstrated his universal law of gravitation by showing that a comet visible during 1680 and 1681 followed the path of a parabola.
Detailed explanation-2: -The Earth’s gravity pulls the Moon toward Earth. At the same time, the Moon has forward movement, or inertia, that partly counters the force of Earth’s gravity. This inertia causes the Moon to orbit Earth instead of falling toward the surface of the planet.
Detailed explanation-3: -5.2. In 1728, Newton demonstrated the universality of the force of gravity with his cannonball thought-experiment. Here Newton imagined a cannon on top of a mountain. Without gravity, the cannonball should move in a straight line. If gravity is present, then its path will depend on its velocity.
Detailed explanation-4: -Newton’s cannonball was a thought experiment Isaac Newton used to hypothesize that the force of gravity was universal, and it was the key force for planetary motion.
Detailed explanation-5: -Newton concluded that two factors-inertia and gravity– combine to keep Earth in orbit around the sun, and the moon in orbit around Earth.