How Do Objects Behave When Dropped from Satellites?

It is constantly changing direction as it orbits the Earth, but its average speed remains the same. This is because the gravitational force is constantly acting on the satellite, causing it to follow a curved path around the Earth.
  • #1
Amith2006
427
2
Sir,
1)If an object is dropped from a satellite moving close to the Earth will it fall to the Earth or will it move along with the satellite? The answer given in my book is, it will fall to the Earth with an acceleration due to gravity. But how is it so? At the instant it is dropped, it has an orbital velocity. So it should move along with the satellite, isn’t it Sir?
2)It is said that the geostationary satellite is falling freely under gravity while orbiting the earth, then how does it have a constant orbital velocity?
 
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  • #2
Amith2006 said:
Sir,
1)If an object is dropped from a satellite moving close to the Earth will it fall to the Earth or will it move along with the satellite? The answer given in my book is, it will fall to the Earth with an acceleration due to gravity. But how is it so? At the instant it is dropped, it has an orbital velocity. So it should move along with the satellite, isn’t it Sir?
This is a guess, but perhaps the key in in the words "close to earth". A satellite in a Low Earth Orbit usually is orbiting in the Exosphere, where there is some tiny amount of air resistance. If the satellite does not use its rockets to provide periodic boosts, it will gradually lose speed and spiral earthwards.

2)It is said that the geostationary satellite is falling freely under gravity while orbiting the earth, then how does it have a constant orbital velocity?
It does not have a constant velocity - only a constant speed.
 

FAQ: How Do Objects Behave When Dropped from Satellites?

1. What is a geostationary satellite?

A geostationary satellite is a type of satellite that orbits the Earth at the same speed and direction as the Earth's rotation, allowing it to appear stationary from a fixed point on the ground.

2. How does a geostationary satellite maintain its position?

A geostationary satellite stays in its position by using its thrusters to counteract the Earth's gravitational pull and maintain a constant distance from the Earth. It also uses gyroscopes and reaction wheels to make small adjustments to its orientation.

3. What are the advantages of using geostationary satellites?

Geostationary satellites have several advantages, including providing continuous coverage over a specific area, allowing for real-time communication and data transmission, and reducing the need for multiple ground stations.

4. What are the challenges of launching a geostationary satellite?

Launching a geostationary satellite requires precise calculations and coordination to ensure that the satellite is placed in the correct orbit and position. It also requires a powerful rocket to reach the necessary altitude and velocity.

5. How long do geostationary satellites typically remain in operation?

Geostationary satellites can remain in operation for an average of 15 years, but this can vary depending on the design and maintenance of the satellite. After this time, they may need to be replaced or repositioned to continue functioning properly.

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