Gravitation Tes...

The graph represented the relation between acceleration due to gravity(g) and depth (d) from the surface of the earth. The value of g at a depth of $$640\ km$$ is 

A planet moves with respect to us that light of $$475 nm$$ is observed at $$475.6 nm$$. The speed of the planet is 

If the distance between two masses is doubled, the gravitational attraction between them Is doubled 

Gravitational pull is maximum

The height at which the value of acceleration due to gravity becomes $$50\% $$ of that at the surface of the earth$$.$$ (radius of the earth =$$6400 km$$) is 

The acceleration due to gravity at a depth of 4600 km inside the earth.

A body weighs W newton at the surface of the earth. Its weight at a height equal to half the radius of the earth will be:

A solid sphere is rotating about an axis passing through its centre with period $$T$$. If its volume shrinks to $$\dfrac {1}{27}$$ the earlier volume mass remaining same, the new period will be

 On account of the earth rotating about Its axis:-

The weight of an object in the coal mine, sea level, at the top of the mountain are $$W_{1},W_{2}$$ and $$W_{3}$$ respectively, then :