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Escape from Earth's (or any other planet's) gravity is dependent on reaching the escape speed for that gravity field. In the case of Earth, that requires a speed of nominally 11.2 kilometers per second. In practice, however, it is never necessary to actually reach that speed, because the effect of gravity lessens as distance from the center of the Earth increases. To answer your question, the amount of thrust (which is normally measured in pounds of thrust, but can be measured in horsepower) is dependent on the weight of the vehicle, its payload and fuel, and on the optimum rate at which it needs to burn its fuel to achieve altitude with the least consumption. On the space shuttles, the three main engines generate a maximum equivalent of about 37 million horsepower. The fuel pump alone delivers as much as 71,000 horsepower, the oxygen pump delivers about 23,000. Space shuttles don't escape Earth's gravity though; they just orbit the Earth. Mathematically, there is no requirement for power but rather for energy. There is no speed requirement for propelled vehicle either. The escape velocity refers to speed that an object needs to achieve leaving the gravitational well altogether without further acceleration. Provided there were efficient technical means(like in case of space elevator) vehicle could climb slowly into space with power going only for overcoming friction and it would be negligible. More power would only make a difference in time it would take to reach the top. Today however it's just technically convenient to boost the payload to orbital speed using enormous rockets and then leave it in free fall.
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How much stronger is the earths gravity than the moons gravity?
The moon's gravity is about 1/6th of Earth's.
How much gravity does planet venus have?
Venus has a gravity of about 0.904g, which is 90.4% of Earth's gravity. This means that if you were on Venus, you would feel almost the same weight as on Earth, but less than the Moon.
How much gravity does the earth have please can you write it in terms a child can understand?
Its hard to explain it, but the equatorial surface gravity is 9.780327 m/s2 or 0.99732 gThe Earths gravity is around 380 ppm (pounds per mile).Sorry if this is too confusing!
What is an object so massive that light cannot escape its gravity is a?
A black hole has so much mass that light can't escape from it once it passes the event horizon. It can still escape if it hasn't passed the evnt horizon.
Which possesses greater gravity Jupiter or earth?
Jupiter. It's gravity is 2.528 times greater than earths.
How much stronger is the earths gravity than the moons gravity?
The moon's gravity is about 1/6th of Earth's.
How much smaller is the Moon's gravity to the earths?
The moon's gravity is one-sixth that of the Earth's;
Is mercurys gravity stronger or weaker th an earths gravity?
Weaker, much weaker.
Would a spacecraft need as much fuel to escape from the moons gravity as it would to escape from the earths?
Escape velocity for the moon is a little over 5000 miles per hour. For the earth it is about 25,000 miles per hour. So the moon requires a fifth of the energy required to escape the earth.
Does the earths moon have gravity?
Yes, the moon has gravity. In fact, all matter has gravity, that is a basic property of matter. Your fingernail has gravity. Not very much, of course, but it does have some.
How would your weight change if you went from the Earth to the moon?
Your would weigh 1/6th as much as you do here on mother Earth. The how is our moons' mass, and therefore its' gravity, is about 1/6 as much as the Earths'. Its' gravity well is not as deep as the Earths.
Why does not the moon have gravity?
The moon does have gravity but it is much weaker it hase 1/6 of the earths gravity. wihout it how do you expect the men on the moon to stay on the moon?
How much more is earths gravity than the moon?
Approximately 6 times more
Does Mars have atmoshere?
Yeah, but only little, like on the moon, there is gravity but not as much as earths
Does mars have any atmoshere?
Yeah, but only little, like on the moon, there is gravity but not as much as earths
Is mercurys gravity stronger than earths?
Planet Mercury and Planet Earth are both rocky planets. But Mercury is much smaller than Earth, so has much less force of gravity. Your answer is "No".
How much gravity does planet venus have?
Venus has a gravity of about 0.904g, which is 90.4% of Earth's gravity. This means that if you were on Venus, you would feel almost the same weight as on Earth, but less than the Moon.
