The earth is assumed to be a sphere of radius R. A platform is arranged at a height R from the surface of the earth. The escape velocity of a body from this platform is fve , where ve is its escape velocity from the surface of the earth. The velocity of f is
The mean radius of earth is R, its angular speed on its own axis is ω and the acceleration due to gravity at earth's surface is g. What will be the radius of the orbit of a geostationary satellite?
The escape velocity from the surface of the earth is ve. The escape velocity from the surface of a planet whose mass and radius are three times those of the earth, will be
ve
3ve
9ve
1/3ve
A satellite A of mass m is at a distance r from the surface of the earth. Another satellite B of mass 2m is at a distance of 2r from the earth's surface. Their time periods are in the ratio of
1 : 2
1 : 16
1 : 32
1 : 2 √2
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
44.8 km/s
22.4 km/s
11.2 km/s (remain unchanged)
5.6 km/s
A ball is dropped from a satellite revolving around the earth at a height of 120 km. The ball will
continue to move with same speed along a straight line tangentially to the satellite at that time.
continue to move with the same speed along the original orbit of satellite
fall down to earth gradually
go far away in space
