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Israr
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Why ISS need to run on such high speed 7.7km/s ?
What will affect if it made to run on very slower speed.
thanks
What will affect if it made to run on very slower speed.
thanks
Israr said:Why ISS need to run on such high speed 7.7km/s ?
What will affect if it made to run on very slower speed.
thanks
Israr said:What will affect if it made to run on very slower speed.
paisiello2 said:
You're absolutely right, I erroneously thought they were the same thing. Why do you use ≈?rumborak said:The speed to completely escape Earth's gravity is something very different from the speed to be in a stable orbit.
paisiello2 said:...Why do you use ≈ ?
paisiello2 said:The equation is derived by equating the centrifugal force to the gravitational force. The small mass m cancels out so I don't why it needs to be "negligible mass".
For a circular orbit, which the ISS is pretty close to, this is exact.
Thankse.bar.goum said:Hi Israr, welcome to PF.
The speed of any object in orbit in a gravitational field (planets around stars, moons around planets, the ISS around the Earth) is determined by the orbital height of the object.
For a circular orbit, and something of negligable mass compared to the other body (e.g. the ISS around the Earth, or the Earth around the sun) this is roughly equal to
##v \approx \sqrt{\frac{G M}{r}}##.
Where G is the gravitational constant, M the mass of the body being orbited around, and r the radius. If you plug in the mass of the earth, and the radius of orbit of the ISS (~412 km above sea level) into that equation, you see that you get 7.7 km/s!
So, you see that if you wanted the ISS to go at a much slower speed, you'd have to push it much further away from the Earth!
The International Space Station (ISS) travels at an average speed of approximately 17,500 miles per hour (28,000 kilometers per hour). This speed allows the ISS to orbit the Earth every 90 minutes.
The ISS needs to travel at a high speed in order to counteract the Earth's gravitational pull and maintain its orbit. If the ISS were to slow down, it would begin to fall towards the Earth.
The speed of the ISS is measured using a variety of instruments, including GPS systems, radar, and laser ranging devices. These instruments track the ISS's position and calculate its speed based on its distance traveled over a certain amount of time.
Yes, the speed of the ISS can change due to a variety of factors such as atmospheric drag, adjustments made by thrusters, and gravitational forces from other objects in space. However, these changes are small and typically do not significantly impact the ISS's overall speed.
Yes, the ISS's speed can be increased or decreased by using thrusters to adjust its orbit. However, changes to the ISS's speed must be carefully planned and executed in order to maintain its orbit and avoid collisions with other objects in space.