The ratio of escape velocity at earth (υe) to the escape velocity at a planet (υp) whose radius and mean density are twice as that of earth 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