2006-11-09 22:21:38 · 8 answers · asked by Musics in my soul 2 in Science & Mathematics ➔ Astronomy & Space
I'M AT`SCHOOL BY THE WAY... DOING SOMTHING ABOUT SPACE
2006-11-09 22:30:50 · update #1
HELLO THIS IS MY SCHOOL TALKING IF YOU DO NOT GIVE ME SOME INFO I SHALL SHOUT AT YOU OVER THE PHONE!!!!!!! :(
2006-11-09 22:36:10 · update #2
Rockets go at many different speeds depending on the application. A good example is the speed a rocket needs to go when leaving the earth and going into earth orbit. This is called "escape velocity". For rockets leaving the north pole where the spin of the earth is not a factor, the escape velocity is 11.2 km/sec (approx. 25,000 miles per hour).
Once out of earth orbit, rockets attached to spacecraft may increase speed to reach distant planets. Speed will stay the same until the rocket is ignited. Once the rocket is burning, the speed will continue to increase. Small rocket engines, like "ion engines", with very low but continuous thrust will keep the rocket accelerating for a very long time.
2006-11-09 22:39:43 · answer #1 · answered by cfpops 5 · 1⤊ 0⤋
I presume that you are asking what speed does a rocket need to travel to escape the pull of earth's gravity.
On the surface of the Earth, the escape velocity is about 11.2 kilometres per second. However, at 9,000 km altitude in "space," it is slightly less than 7.1 km/s.
It's really a little more complicated than that because it depends on whether the rocket it travelling WITH the earth's rotation or AGAINST it. The Wikipedia article gives the necessary explanation.
2006-11-10 06:25:14 · answer #2 · answered by Owlwings 7 · 2⤊ 0⤋
Rockets
1.When a rocket is launched, what does it push against to accelerate upward?
2.The space shuttle sitting on the launch pad on earth has a mass of 2,000,000 kg. At launch it can generate a thrust of 30,000,000 Newtons. What is it's upward acceleration (Acceleration due to gravity on earths surface is 9.81m/s2)?
3.How will the acceleration of the shuttle change as it flies upwards?
Orbits
4.The space shuttle in low earth orbit (LEO) takes about 90 minutes to circle the earth. Assuming that the orbit is circular what is the orbits height?
5.If you and a friend 10m away each have masses of 70kg, how much gravitational force are you exerting on your friend?
6.Given that the mass of Jupiter is 1.9x1027 kg and it's diameter is 142,796km calculate the gravitational acceleration on the surface of Jupiter. What would you weigh on Jupiter?
7.A satellite is launched into a circular orbit at a height of 450 km which ensures that it will have a lifetime of five years. What is the speed of the satellite? What is the satellites period? Why can the satellite not be guaranteed to have a lifetime of five years if it's orbital height is less than 450 km?
2006-11-10 06:25:53 · answer #3 · answered by richard_beckham2001 7 · 0⤊ 3⤋
assuming by rocket you mean a space rocket....
it accelerates from 0 to 18,500 MPH. This speed is needed to overcome the gravitational pull from the earth.
You can watch launches, including archived ones. on NASA TV, on the nasa.gov website.
The commentry calls out the speed every so often, the acceleration is astounding.
2006-11-10 06:30:43 · answer #4 · answered by Michael H 7 · 1⤊ 0⤋
Depends on which rocket you're on about, I would have imagined tha the Saturn 5 rockets were the fastest, because of the amount of fuel they carried. I would reccomend looking at wikipedia and typing in WHICH rocket you're on about.
2006-11-10 06:24:58 · answer #5 · answered by IshotJR 2 · 2⤊ 1⤋
ALL DIFFERENT SPEEDS. DEPEDS ON WHAT TYPE OF PROPULSION IT USES. whe weight of the rocket - the force of gravity x the thrust will give it lift.
2006-11-10 06:28:04 · answer #6 · answered by techno mentalist 4 · 0⤊ 0⤋
depends on who is given you it!
2006-11-17 05:33:52 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Fast - very very fast!
2006-11-10 06:22:58 · answer #8 · answered by Pippa 2 · 0⤊ 3⤋