Welcome to your Ncert – class 9- science – Chapter 9 – Gravitation 2
Two masses m and M are kept at a distance r from each other. The ratio of the force exerted on
Relative density of a substance is expressed by comparing the density of that substance with the density of:
If a rock is brought from the surface of the moon.
If the weight of a man on earth’s surface is 60 N, then what will be the weight on the surface of the moon?
If the masses of two bodies are doubled and the distance between them is halved, then the new gravitational force between them is how many times the original?
If R is the radius of a planet, g is the acceleration due to gravity and G is the gravitational constant then find the density of the planet.
Construction of submarines is based on
Universal gravitational constant, G depends:
The radius of the Earth is about
A body, the mass and the weight of which were already determined at the Equator, is now placed at the Pole. In this context, choose the correct statement from the following:
When an object is thrown up, the force of gravity.
Astronomers have discovered a planet orbiting a nearby star. It is estimated that the mass of this planet is 16 times that of our earth and its density is one-fourth of the earth's density. Assume that planets are spheres of uniform density. If your weight on the earth is 1000 N, then your weight on this planet would be
Newton's law of gravitation is called the universal law of gravitation because:
The mass of an object ................
Suppose universal gravitational constant of starts decrease, then:
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