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The mean orbital velocity of Earth is about 29.783 kilometers per second. That's the speed the planet is moving through space in its orbit about the sun. Earth's speed varies a bit because its orbit is slightly eccentric, but that's why we say meanorbital velocity.
One can calculate this value by knowing two facts:
1. The earth is approximately 150 million km from the sun (mean distance) and travels approximately in a circular orbit
2. It takes one year for the earth to complete one orbit around the sun
Using (1), we can calculate the circumference of the earth's orbit (C) using 2piR, where R is the mean radius. This gives us
C ~ 300pi million km
for the total distance traveled in one year. One can calculate the number of seconds in a year by
T = 365 days/year *24 hours/day*60 minutes/hour*60 seconds/minute
This is very close to 10pi million seconds (within 0.3%). The mean speed is then given by:
V = C/T ~ 30 km/sec
As can be seen, this simple calculation is within 1% of the accepted value.
30 kilometers/second.
Lupe Hahn
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The velocity a rocket must reach to establish an orbit around earth is called?
Orbital velocity, or Close orbital velocity.
What 2 things keep something in orbit around the earth?
Mass & Velocity .
The velocity a rocket must reach to establish an orbit in space is?
The velocity of rocket must reach 16x than the gravitational force of Earth to establish an orbit in space.
How does a space shuttle accelerate in space?
By reducing its velocity and dropping to a lower orbit. Objects in low orbit travel around the earth faster due to the orbit's smaller circumference. Conversely, it slows down by increasing its velocity and ascending to a higher orbit with a greater circumference.
What may happen to a rocket which rises from the earth never attains escape velocity?
A rocket that doesn't reach "escape velocity" will be overcome by gravity and will be pulled back down to Earth. Also, rockets which go into orbit have not reached escape velocity. Escape velocity is what is needed to completely leave earth's gravity well.
Is the escape velocity from the center of the earth different from the escape velocity from Earth's orbit?
Yes, very much so.
The velocity required to keed a satellite in orbit around the Earth is called?
circular velocity
The velocity a rocket must reach to establish an orbit around earth is called?
Orbital velocity, or Close orbital velocity.
The average velocity of the earth in its orbit is about miles per hour?
66,000
How long would it take a satellite launched to a distance of 6700 from the center of the earth to orbit the earth?
For stable orbit @ 6 700 000 metres Velocity = sq. root ( G * mass earth / orbit radius ) = 7713.576 metres / sec Time for (sidereal) orbit = (2 * pi * radius) / velocity = 5457.56 seconds.
Can you consider earth as having a uniform velocity?
No. Earth's rotational velocity is slowing. Do you mean the velocity of Earth's revolution around the sun? The earth speeds up in its orbit until it reaches perihelion, and then slows until it reaches aphelion.
Velocity is the speed and direction a rocket must have in order to orbit he earth?
save
What 2 things keep something in orbit around the earth?
Mass & Velocity .
How does the sun stay in orbit around the sun?
The Sun's gravity keeps the Earth (and all the planets) in orbit around it. Yes, but obviously there's more to it or the planet would go into the Sun. It is the Earth's orbital velocity ( technically known as its tangential velocity) which, together with the force of gravity, keeps the Earth in orbit.
A satellite in an elliptical orbit travels at constant what?
If the path is perfectly circular, yes, the speed is constant. This should not be confused with the velocity, because while speed is constant, its direction is not; therefore velocity is always changing.
How satellites stay in orbit?
The reason that satellites stay in orbit around Earth is because of two factors. Velocity and the gravitational pull between the satellite and the Earth.
The velocity a rocket must reach to establish an orbit in space is?
The velocity of rocket must reach 16x than the gravitational force of Earth to establish an orbit in space.
