Gravitation Tes...

If the earth is replaced by a small point sized particle of the same mass, it is the geodesic centre. How will the force of gravity change at the present surface of the earth? (Assuming the earth to be a perfect sphere)

What causes tides?
(i) Attraction of sun
(ii) Attraction of moon
(iii) Attraction of earth

If somehow, the distance between the Sun and Earth is doubled, then the gravitational force between them will become

A planet has twice the values of mass and radius as of Earth. Acceleration due to gravity on the surface of this planet is

The rate of fall of g on going up the earth's surface is ______ the rate when going down the earth's surface.

The weights of an object in a coal mine, at sea level and on the top of a mountain are W₁, W₂ and W₃, respectively. Which of the following relations holds true?

Which of the following statements are true?
(i) Orbital velocity is more than escape velocity.
(ii) Escape velocity is √2 times the orbital velocity.
(iii) Orbital velocity increases with radius.
(iv) A body with a velocity equal to the orbital velocity will orbit the planet in a circular path.