At what height from the surface of earth the gravitation potential and the value of g are
respectively? Take the radius of earth as 6400 km:

If the distance between sun and earth were reduced to half its present value, then the number of days in one year would have been

​The escape velocity for a body of mass 1kg from earth's surface is 11.2$$\text{kms}^{-1}$$​ the escape velocity for a body of mass 100 kg would be:​

If the acceleration due to gravity of the earth is 6 times the acceleration due to gravity on moon, which of the following statement is correct?

What will happen during the free fall of a massive object under the influence of gravitational force of the earth?