Gravitation Tes...

The depth at which the effective value of acceleration due to gravity is $$\dfrac{g}{4}$$ is

Universal gravitational constant, G depends:

The acceleration of a body due to the attraction of the earth (radius $$R$$) at a distance $$2R$$ from the surface of the earth is ($$g= $$ acceleration due to gravity at the surface of the earth)

Practically the value of G for the first time was measured by ...........

An object moves from earths surface to the surface of the moon. The acceleration due to gravity on the earths surface is $$10 m/s^{2}$$. Considering the acceleration due to gravity on the moon to be $$1/6th$$ times of that of earth. If $$R$$ be the earths radius and its weight be $$W$$ and the distance between the earth and the moon is $$D$$. The correct variation of the weight $$W'$$ versus distance $$d$$ for a body when it moves from the earth to the moon is

A boy can jump to a height $$h$$ from ground on  earth . What should be the radius of a sphere of density $$\delta $$ such that on jumping on it, he escapes out of the gravitational field of the sphere?

The value of $$g$$ at a height $$h$$ above the surface of the earth is the same as at a depth $$d$$ below the surface of the earth. When both $$d$$ and $$h$$ are much smaller than the radius of earth, then which one of the following is correct

At what distance above the surface of earth, the gravitational force will be reduced by $$10\%$$, if the radius of earth is $$6370$$ Km.

A particle of mass 1kg is placed at a distance of 4m from the centre and on the axis of a uniform ring of mass 5kg and radius 3m. The work done to increase the distance of the particle from 4m to $$\sqrt{3}m$$ is.

A particle of mass $$10 gm$$ is kept on the surface of a uniform sphere of mass $$100 kg$$ and radius $$10 cm$$. Find the work done against the gravitational force between them, to take the particle far away from the sphere. $$\left ( G= 6.67\times10^{-11}Nm^{2}/Kg^{2} \right )$$