2007-10-09 01:11:17 · 14 answers · asked by JOHN M 1 in Science & Mathematics ➔ Astronomy & Space
If you mean escape velocity, it's about 7 miles/second
2007-10-09 01:15:19 · answer #1 · answered by SteveA8 6 · 1⤊ 0⤋
The answer to this question depends upon two factors:
Which direction will you travel? East or West. Going with an
Easterly launch, you have the spin of the Earth assisting you in reaching the Escape Velocity. If you launch to the West, you must overcome the speed of the Earth's rotation so it takes more launch acceleration to reach Escape Velocity.
And, your exact location on Earth's surface matters greatly.
The Earth is a sphere that is spinning. The surface of the sphere is moving the fastest at the Equator, and slowest at
the North Pole and South Pole. So, assuming that you wish to launch to the East and gain the boost of the Earth's spin to reach Escape Velocity, the maximum boost would occur if you launched somewhere near the Equator, and the least boost would occur if you launched from one of the Poles or that vicinity.
Escape Velocity is 11.2 Km/Sec or 6.96 Miles/Sec which is equivalent to 25,056 Miles Per Hour give or take, and depending upon launch location and direction. Use the boost of the Earth's spin and you don't have to go quite as fast to get the job done.
2007-10-09 08:40:11 · answer #2 · answered by zahbudar 6 · 1⤊ 1⤋
To go into orbit you need to achieve a velocity of 18,000mph.
To leave Earth entirely your speed needs to be over 25,000mph.
2007-10-09 10:45:13 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The escape velocity for Earth's gravity is around 25,000 miles per hour.
http://www.physlink.com/Education/AskExperts/ae158.cfm
http://www.onlineconversion.com/speed_common.htm
http://library.thinkquest.org/03oct/02144/basics/escape.htm
Use the conversion site. 11.2 km/s is equal to a shade over 25,000 mph.
2007-10-09 08:16:14 · answer #4 · answered by Anonymous · 0⤊ 0⤋
You can travel directly up as slowly as you like, but when you run out of fuel to resist gravity you will plummet back to earth.
However when in space, you travel sideways at over 11 km/sec, you will go into earth orbit, which will keep you up in space like a satelite.
Next time watch the shuttle take off, it starts to "roll" over on its back to give it the sideways speed to get it into orbit.
2007-10-09 08:42:57 · answer #5 · answered by Anonymous · 0⤊ 1⤋
Escape velocity from Earth is 6.9 miles per second.
2007-10-09 11:20:54 · answer #6 · answered by johnandeileen2000 7 · 0⤊ 0⤋
Escape velocity = approx' 17500 mph
2007-10-09 08:24:18 · answer #7 · answered by McQ 3 · 0⤊ 0⤋
It's not so much speed as it is about the lift force that is needed to overcome gravity.
2007-10-09 08:15:53 · answer #8 · answered by k² 6 · 0⤊ 0⤋
its about 80 miles to leave it and you have to go 18,000mph miles to escape gravity.
2007-10-09 08:30:04 · answer #9 · answered by Anonymous · 0⤊ 0⤋
its approx 11.2 km per second on earth.
2007-10-09 08:15:28 · answer #10 · answered by Anonymous · 0⤊ 0⤋