Questions in gravitation

Select	Question
	The escape velocity of a body on the surface of the earth is 11.2 km/s. If the earth's mass increases to twice its present value and the radius of the earth becomes half, the escape velocity would become
	Given mass of the moon is 1/81 of the mass of the earth and corresponding radius is 1/4 of the earth. If escape velocity on the earth surface is 11.2 km/s, the value of same on the surface of the moon is
	The angular velocity of rotation of star (of mass M and radius R) at which the matter start to escape from its equator will be
	The least velocity required to throw a body away from the surface of a planet so that it may not return is (radius of the planet is $6.4 \times {10^6}m,\,\,g = 9.8\,m/se{c^2})$
	How many times is escape velocity $({V_e})$, of orbital velocity $({V_0})$ for a satellite revolving near earth
	Escape velocity on earth is 11.2 km/s. What would be the escape velocity on a planet whose mass is 1000 times and radius is 10 times that of earth
	If the radius of a planet is R and its density is $\rho$, the escape velocity from its surface will be
	Escape velocity on the earth
	If acceleration due to gravity on the surface of a planet is two times that on surface of earth and its radius is double that of earth. Then escape velocity from the surface of that planet in comparison to earth will be
	The escape velocity of a rocket launched from the surface of the earth