Advertisements
Advertisements
Question
State the law of gravitation. Why is it called universal?
Solution
Every object in the universe attracts every other object with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
The Law of gravitation is called universal because it applies to all bodies of the universe.
APPEARS IN
RELATED QUESTIONS
Can we apply Newton’s third law to the gravitational force ? Explain your answer.
State and explain Kepler's laws of planetary motion. Draw diagrams to illustrate these laws.
Consider a planet moving in an elliptical orbit round the sun. The work done on the planet by the gravitational force of the sun
(a) is zero in any small part of the orbit
(b) is zero in some parts of the orbit
(c) is zero in one complete revolution
(d) is zero in no part of the motion.
How will the force of gravitation between two objects change if the distance between them is:
Infinite
How will the force of gravitation between two objects change if the distance between them is:
Almost zero
Is the law of gravitation applicable in case of the sun and the moon?
What does a force do in the following case?
You twist a piece of rubber.
For the weight of body of mass 5 kg to be zero on equator of the earth, angular velocity of the earth must be (The radius of earth = 6400 km, acceleration due to gravity = 10 m/s2).
Three uniform spheres, each having mass m and radius r, are kept in such a way that each touches the other two. The magnitude of the gravitational force on any sphere due to the other two is
Particles of masses 2M, m and M are respectively at points A, B and C with AB = ½ (BC). m is much-much smaller than M and at time t = 0, they are all at rest (Figure). At subsequent times before any collision takes place ______.
