An artificial satellite orbiting the earth does not fall down because the earth's attraction
is balanced by the attraction of the moon
vanishes at such distances
is balanced by the viscous drag produced by the atmosphere
produces the necessary acceleration of its motion in a curved path
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If a satellite is orbiting the earth very close to its surface, then the orbital velocity mainly depends on
the mass of the satellite
the radius of earth
the orbital radius
the mass of earth
When satellite is orbiting close to the surface of earth, orbital velocity, where and are the mass and radius of earth.
Two satellites of masses and are revolving round the earth in circular orbits of radii and respectively. Which of the following statements is true regarding their velocities and ?
Since (orbital velocity)
So
Two satellites and of masses and are revolving round the earth at height of and 1600 respectively. If and are the time periods of a :
[Given: radius of earth , mass of earth ]
Speed of satellite,
Time,
If suddenly the gravitational force of attraction between earth and a satellite revolving around it becomes zero, then the satellite will
continue to move in its orbit with same velocity
move tangentialy to the original orbit in the same velocity
become stationary in its orbit
move towards the earth
When gravitational force becomes zero, centripetal force on satellite becomes zero so satellite will move tangentially to the original orbit with same velocity
A small satellite is revolving near earth's surface. It's orbital velocity will be nearly
The orbital velocity of satellite near the earth surface is
metre
Two stars of masses and at a distance rotate about their common centre of mass in free space. The period of revolution is :
The minimum and maximum distances of a satellite from centre of earth are and respectively, where is the radius of earth. The minimum and maximum speeds of the satellite will be
None of these
The least energy required to launch a satellite of mass 100 from the surface of a planet of mass and radius 3200 in a circular orbit at an altitude of is:
given
Gravitational potential energy
and orbital velocity,
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