Gravitation Tes...

If earth were to rotate on its own axis such that the weight of a person at the equator becomes half the weight at the poles, then its time period of rotation is: ($$g$$=acceleration due to gravity near the poles and $$R$$ is the radius of earth) (Ignore equatorial bulge)

When a body is at a depth 'd' from the earth surface its distance from the centre of the earth is _______

If R is the radius of earth, the height at which the weight of a body becomes $$1/4$$ its weight on the surface of earth is :

Every planet revolves around the sun in a/an ______ orbit.

The ratio of SI unit of G to its CGS unit is _______.

A body weighs $$72 N$$ on the surface of the earth. What is the gravitational force on it at a height equal to half the radius of the earth from the surface?

The figure given below shows a planet in elliptical orbit around the sun $$S$$. At what position will the kinetic energy of the planet be maximum?

At what height from the surface of the earth (in terms of the radius of earth) the acceleration due to gravity will be $$\dfrac {g}{2}?$$

At what height from the surface of the earth (in terms of the radius of earth) the acceleration due to gravity will be $$\dfrac {4g}{9}?$$

A body weighs $$100\ N$$ at a distance $$\dfrac {R}{4}$$ from centre of earth. Find its weight at height of $$9\ R$$ from the surface of earth (R - Radius of earth)