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Short Tricks for Revision: Gravitation Video Lecture | Physics Class 11 - NEET

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FAQs on Short Tricks for Revision: Gravitation Video Lecture - Physics Class 11 - NEET

1. What is the formula to calculate the force of gravity between two objects?
Ans. The formula to calculate the force of gravity between two objects is given by Newton's law of universal gravitation: F = (G * m1 * m2) / r^2, where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between the centers of the two objects.
2. How does the distance between two objects affect the force of gravity between them?
Ans. The force of gravity between two objects is inversely proportional to the square of the distance between their centers. This means that as the distance between the objects increases, the force of gravity decreases. Conversely, as the distance decreases, the force of gravity increases.
3. What is the difference between mass and weight?
Ans. Mass is a measure of the amount of matter in an object and is a scalar quantity. It remains the same regardless of the location of the object. On the other hand, weight is the force exerted on an object due to gravity and is a vector quantity. It depends on the mass of the object and the acceleration due to gravity at that location.
4. How does the mass of an object affect the force of gravity acting on it?
Ans. The force of gravity acting on an object is directly proportional to its mass. This means that as the mass of an object increases, the force of gravity acting on it also increases. Therefore, objects with larger masses experience a stronger gravitational force.
5. What is the value of the gravitational constant (G) and why is it important?
Ans. The value of the gravitational constant (G) is approximately 6.67430 × 10^-11 N m^2/kg^2. It is a fundamental constant in physics that determines the strength of the gravitational force between two objects. The gravitational constant is important as it allows us to calculate the force of gravity between any two objects and understand the behavior of celestial bodies, such as planets, stars, and galaxies.
118 videos|470 docs|189 tests
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