The escape velocity from the Earth’s surface is V. The escape velocity from the surface of another planet having a radius, four times that of Earth and same mass density is:

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?

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