Gravitation Tes...

Energy required to move a body of mass m from an orbit of radius 2R to 3R is

Radius of orbit of satellite of earth is R. Its kinetic energy is proportional to

The escape velocity for a rocket from earth is 11.2 km/sec. Its value on a planet where acceleration due to gravity is double that on the earth and diameter of the planet is twice that of earth will be in km/sec

The escape velocity from the earth is about 11 km/second. The escape velocity from a planet having twice the radius and the same mean density as the earth, is

If g is the acceleration due to gravity at the earth\'s surface and r is the radius of the earth, the escape velocity for the body to escape out of earth\'s gravitational field is

The escape velocity of a projectile from the earth is approximately

Two small and heavy spheres, each of mass M, are placed a distance r apart on a horizontal surface. The gravitational potential at the mid-point on the line joining the centre of the spheres is

The escape velocity of a planet having mass 6 times and radius 2 times as that of earth is

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 1/81of the mass of the earthand 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