Expression "to win against gravitation", perhaps, sounds as excerpt from the fantastic novel, however, in practice in overcoming an attraction of the earth there is nothing supernatural. For this purpose it is only enough to apply to an object the force exceeding force of an attraction and sent to the opposite direction.
Instruction
1. It is the simplest to force to win against gravitation, let and for short time, any small subject. For this purpose it is enough to throw of it.
2. The first aircraft created by mankind overcame gravitation because the sphere filled with gas which density is less than density of air was their part. It can be, in particular, helium, hydrogen, the warmed air. Today hydrogen in this quality is not applied because of its fire danger.
3. Aircraft heavier than air overcome gravitation due to existence of engines on them. Carrying power in them can be created by means of the air screw (in combination with wings or without that) and also a reactive way - due to ejection from a gas stream nozzle. The second way is applicable also in the absence of around air that allows to use it and outside the atmosphere.
4. Birds, insects and even some mammal (bats) overcome gravitation, making a start from air wings. In the equipment such decision is not applied. The artificial aircraft working at this principle (makholeta or ornithopters) are extremely inefficient and therefore are used only in the demonstration purposes.
5. In the device for a magnetic levitation there is a sensor (optical or induction) tracing the provision of the object made of magnetic material. If an object is too close to an electromagnet, the last is switched off and if it is too distant - joins. The speed of the scheme is enough in order that an object soared in air under an electromagnet.
6. Any subject which overcame gravitation in Earth attraction area of coverage immediately will start over again falling if force which forced it to win against gravity disappears. To force it to leave the planet forever, it is necessary to disperse it to so-called first cosmic speed. For Earth it makes about 7.9 kilometers per second.