How many mph?
2007-03-26 13:33:24 · 4 answers · asked by annmarie_tpg 2 in Science & Mathematics ➔ Astronomy & Space
It is not a case of busting out the atmosphere, as you call it. It is escaping Earth's gravity
The escape velocity of earth is about 7 miles/sec. But you only need 5 miles/sec to achieve orbit.
2007-03-26 13:38:24 · answer #1 · answered by nick s 6 · 1⤊ 0⤋
How so? To escape earth's atmosphere enough to orbit the earth at an altitude of 350 miles or so? Approx 17,500 mph (space shuttle/space station orbit velocity). To completely escape earths atmosphere and go onto other planets? Probably in excess of 20,000 mph
2007-03-26 20:44:39 · answer #2 · answered by mcdonaldcj 6 · 0⤊ 0⤋
Escape velocity is the speed a craft must reach to escape an object's gravity field. To escape Earth's you must be going at 11.2 km/s or about 7 miles per second. (times 60 for mph) In reality, to escape Earth's gravity field, we first put the object in low orbit, where the escape velocity is lowered to 10.9km/s or even lower, then we accelerate it out.
2007-03-26 20:40:50 · answer #3 · answered by ritifo 2 · 0⤊ 0⤋
The escape velocity from the earth is 7 miles per second or 25,200 miles per hour.
2007-03-26 20:39:33 · answer #4 · answered by Twizard113 5 · 1⤊ 0⤋