Gravitation

Law of gravitation gives the gravitational force between

• the Earth and a point mass only

• the Earth and Sun only

• any two bodies having some mass

• two charged bodies only

Where it will be profitable to purchase one kilogram of apples?

• At poles

• At Equator

• At 45°Latitudes

• At 60° Latitudes

What is the force of attraction between two unit point masses separated by a unit distance called?

• gravitational potential

• acceleration due to gravity

• gravitational field

• universal gravitational constant

The acceleration due to gravity on the Earth depends upon the

• mass of the body

• mass of the Earth

• shape and size of the body

• volume of the body

If the gravitational attraction of the Earth suddenly disappears, which of the following statements will be true?

• The weight of body will become zero but the mass will remain same.

• The weight of a body will remain same but the mass will become zero..

• Both mass and weight become zero.

• Neither mass nor weight becomes zero.

The weight of an object at the centre of the Earth of radius R is

• zero

• infinite

• R times the weight at the surface of the Earth

• 1/R² times the weight at surface of the Earth

Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be

• 1/4 times

• 4 times

• 1/2 times

• unchanged

The value of quantity G in the law of gravitation

• depends on mass of Earth only

• depends on radius of Earth only

• depends on both mass and radius of Earth

• is independent of mass and radius of the Earth

The gravitational force between two objects is F. If masses of both objects are halved without changing the distance between them, then the gravitational force would become

• F/4

• F/2

• F

• 2F

Two objects of different masses falling freely near the surface of the moon would

• have same velocities at any instant

• have different acceleration

• experience forces of same magnitude

• undergo a change in their inertia