Gravitation Mock Tests

The gravitational potential energy of a body of mass m at the surface of Earth is:

A satellite orbits the Earth at a height h = R_E (Earth's radius) above the surface. If the escape velocity from Earth's surface is 11.2 km/s, the orbital velocity of the satellite is:

Two satellites A and B of masses 200 kg and 400 kg orbit the Earth in circular orbits at distances 8000 km and 16000 km from the center of the Earth respectively. The ratio of their orbital speeds v_A / v_B is:

The escape velocity from Earth is 11.2 km/s. The escape velocity from a planet having mass and radius 4 times that of Earth is:

The escape velocity from the Earth is 11.2 km/s. The escape velocity from a planet with twice the Earth mass and twice the Earth radius is:

If the radius of Earth were to shrink by 1% without change in its mass, the acceleration due to gravity on its surface would:

Two satellites A and B orbit the Earth in circular orbits of radii R and 4R respectively. If the orbital velocity of satellite A is v₀, the orbital velocity of satellite B is:

The orbital velocity of a satellite close to Earth surface is approximately: