NDA || SCIENCE || PHYSICS || GRAVITATION|| QUIZ

A hollow spherical shell is compressed to half its radius. The gravitational potential at the centre

Which one of the following statements about gravitational force is NOT correct?

Mass of a particular amount of substance

1) is the amount of matter present in it.

2) does not vary from place to place.

3) changes with change in gravitational force.

Select the correct answer using the code given below:

The acceleration due to gravity ‘g’ for objects on or near the surface of the earth is related to the universal gravitational constant ‘G’ as (‘M’ is the mass of the earth and ‘R’ is its radius):

A solid sphere of mass ‘M’ and radius ‘a’ is surrounded by a uniform concentric spherical shell of thickness 2a and mass 2M. The gravitational field at distance ‘3a’ from the centre will be: