Physics GK 07 - Satellites

What do we call the minimum velocity with which a body must be projected up, so as to enable it to just overcome the gravitational pull?

Orbital velocity

Gravitational velocity

Escape velocity

None of the above

What is the value of escape velocity for earth?

9.8 km s^-2

1.6 km s^-2

11.2 km s^-2

7.92 km s^-2

On which of the following the escape velocity of a body does not depend?

Mass of the body

Radius of the planet

Mass of the planet

None of the above

Which of the following condition will be true for a planet to have atmosphere?

velocity of molecules in its atmosphere is lesser than escape velocity

velocity of molecules in its atmosphere is greater than escape velocity

velocity of molecules in its atmosphere is twice the escape velocity

velocity of molecules in its atmosphere is equal to the escape velocity

What is the height of geo-stationary satellites from the surface of the earth?

30000 km

36000 km

48000 km

72000 km