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| Satellites are in orbit, the big question in our mind |
Since gravity weakens with distance, orbit satellites necessary to keep the speed varies with height.Engineers must rotate the satellite in orbit, how fast and how high can calculate. For example, a geostationary satellite is positioned always at the same point level, height 357 kilometers (one revolution of the Earth around its axis corresponds to time) for 24 hours should turn . Jrtasytlayt gravity and inertia balance between gravity and the air on a rope attached to the load can be simulated by rotating. Role of attractive rope tension load in a circular orbit obtained by performing load inertia, the rotation is to move away from the center.You cut the rope, cargo flying in a straight path perpendicular to the radius of its orbit
Balance between inertia and gravity to achieve, the satellite must have a well-defined speed. They fly very fast tujrta overcomes the force of gravity and satellite orbit leaves.(Allowed to leave Earth orbit satellite called escape velocity, calculated, interplanetary space stations plays an important role in the beginning.) If the satellite is moving too slowly, gravity, inertia and satellite I will win the war will fall to the ground.That is why the U.S. Skylab space station in Earth's upper atmosphere as a result of increased resistance began to decline in 1979, has been. Once iron tweezers gravity station soon fell to the ground.
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