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The Universal Law of Gravitation - 1 Video Lecture | Famous Books for UPSC Exam (Summary & Tests)
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| 1. What is the Universal Law of Gravitation? |  |
Ans. The Universal Law of Gravitation is a fundamental principle in physics that describes the force of gravity between two objects. It states that every object in the universe attracts every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
| 2. Who discovered the Universal Law of Gravitation? | |
Ans. The Universal Law of Gravitation was discovered by Sir Isaac Newton, an English physicist and mathematician, in the late 17th century. His groundbreaking work on gravity revolutionized the field of physics and laid the foundation for a better understanding of the motion of celestial bodies.
| 3. How does the Universal Law of Gravitation explain the motion of planets and satellites? | |
Ans. The Universal Law of Gravitation explains the motion of planets and satellites by stating that they are constantly being pulled towards the center of the object they are orbiting due to the force of gravity. This force acts as a centripetal force, keeping them in their respective orbits. The Law also explains that the strength of this gravitational force decreases with the square of the distance between the objects, which is why planets and satellites move faster when they are closer to the object they are orbiting.
| 4. Can the Universal Law of Gravitation be applied to objects on Earth? | |
Ans. Yes, the Universal Law of Gravitation can be applied to objects on Earth. Although the force of gravity between two objects on Earth is relatively small compared to that between celestial bodies, it still follows the same principle. The Law explains why objects fall towards the Earth when dropped and why we experience weight due to the gravitational pull of the Earth.
| 5. How does the Universal Law of Gravitation relate to the motion of tides? | |
Ans. The Universal Law of Gravitation plays a crucial role in explaining the motion of tides. The Moon's gravitational pull on the Earth's oceans causes the tides to rise and fall. The Law states that the force of gravity between the Moon and the Earth is stronger on the side of the Earth facing the Moon, causing a bulge in the ocean and creating a high tide. On the opposite side of the Earth, there is also a high tide due to the gravitational force. The areas in between experience low tides.
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