Infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1m, 2m, 4m, 8m, .... , respectively, from the origin. The resulting gravitational potential due to this system at the origin will be:

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?