Yes, gravity exists at any distance away from a planetary body.
None.On Mercury or Mars, which have the weakest gravity (acceleration = 3.8 m/s^2), you would still hit the ground at approx 20 m/s = 72 km/hour.
It would proceed in one direction along a straight line at a speed of about 1.022 km/s
Because the moon is 360,ooo KM away and the Earth's gravity slowed them down on the way, until they were very close to the Moon and the Moon's gravity started speeding them up.
The Wikipedia lists a gravitational acceleration of 0.003 9 m/s2. I am quite sure this is an estimate or calculation, and has never actually been measured. For comparison, Earth's gravitational acceleration is 9.8 m/s2.
Not always. The force of gravity is given by Newton's Law of Universal Gravitation: F=(Gm1m2)/r2 So if a planet had twice the mass of the earth, and the same radius, gravity would be twice as strong. However, if you had a huge planet that weighed the same as the earth (let's say it had a radius 3x greater), then gravity would be 9 times weaker at the surface. The reason big planets like Jupiter have so much gravity is becuase they have A LOT more mass than the earth does.
Answer: 6400 km = 3,976.775 mi.
6400 km = 640 000 000 cm
1000 metres = 1 kilometre. So 6400 m = 6400/1000 = 6.4 km. Simple!
64 km = 6400 m
20997375.4 ft
1km = .62 miles 6400 x .62 =3968 miles
It is approx 7044 km.
1 km = 1000 m so 6.4 km = 6400 m
6,400 kilometers = 3,976.8 miles.
You are traveling at 1,280 km per hour.
The radius of Earth in kilometers is 6400 km.The earth is big in 6400 km in radius above its surface.
Yes. Earth's gravity is still very present at 36,000 km. This is what keeps geosynchronous satellites in orbit. Earth is the dominant gravitational body much farther out than that, to a distance of about 1.5 million km. Beyond that distance there is still gravity, but the sun, not Earth, dominates.