A seconds pendulum is mounted on a rocket. Its period of oscillation decreases when the rocket
comes down with uniform acceleration.
moves round the earth in a geostationary orbit.
moves up with a uniform velocity.
moves up with uniform acceleration.
Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g', then
g' = 3g
g' = 9 g
g' = 27g
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 from earth is 11.2 km/s. If a body is to be projected in a direction making an angle 45o to the vertical, then the escape velocity is
11.2 x 2 km/s
11.2 km/s
11.2/√2 km/s
11.2√2 km/s
The satellite of mass m is orbiting around the earth in a circular orbit with a velocity v. What will be its total energy ?
mv2
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
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
For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is
A ball is dropped from a satellite revolving around the earth at a height of 120 km. The ball will
continue to move with the 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 the satellite
fall down to earth gradually
go far away in space
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?
