What principle did Shenzhou 7 take off

Newton's Three Laws.

Newton's Three Laws.

Newton's three laws are important laws in mechanics, and they are the basis for the study of classical mechanics.

1 Newton's First Law.

Contents: Any object remains at rest or in a uniform linear motion until it is forced to change this state by the forces of other objects.

Explanation: Objects have a tendency to maintain rest and move in a uniform linear line, so the motion state of the object is determined by its motion speed, and its motion state will not change without external force. This property of an object is called inertia.

So Newton's first law is also known as the law of inertia. The first law also clarifies the concept of force. It is clarified that force is the interaction between objects, and it is pointed out that it is force that changes the motion state of objects.

Because acceleration describes the change in the state of motion of an object, force is related to acceleration, not to velocity. If you don't pay attention to this in your daily life, you will often have a false impression.

Note: Newton's first law does not hold true in all frames of reference, in fact it only holds in inertial frames of reference. Therefore, Newton's first law is often used as a criterion for whether the frame of reference is an inertial frame of reference.

2 Newton's second law.

Contents: The object will produce acceleration under the action of the resultant external force, and the direction of acceleration is the same as the direction of the resultant external force, and the magnitude of the acceleration is proportional to the magnitude of the resultant external force and the inverse proportion of the inertial mass of the object.

The second law quantitatively describes the effect of the force acting on and quantitatively measures the magnitude of the inertia of an object. It is vector and is an instantaneous relation.

It should be emphasized that the combined external force on the object will produce acceleration, which may change the motion or velocity of the object, but this change is related to the motion state of the object itself.

In a vacuum, since there is no air resistance, various objects have the same acceleration regardless of their mass because they are only subjected to gravity. Therefore, in free fall, their velocity changes the same in the same time interval.

3 Newton's Third Law.

Contents: The action and reaction forces between two objects, on the same straight line, equal in magnitude and opposite in direction.

Note: To change the motion of an object, other objects must interact with it. The interaction between objects is manifested through force.

He also pointed out that the action of force is mutual, and there must be a reaction force. They act on the same straight line, equal in size and opposite in direction.

Also note:

1) There is no priority or priority between action and reaction forces. Creates and disappears at the same time.

2) This pair of forces acts on different objects and cannot be counteracted.

3) The action force and the reaction force must be forces of the same nature.

By rocket, the rocket is by the flame gas ejected, the action force is equal to the reaction force, the rocket pushes the air and pushes the rocket.

The fuel is burned in the thruster combustion chamber, the volume expands, the gas is ejected from the vent at high speed, and the rocket is re-thrusted ,-- take off using the principle of force interaction.

The thrust generated by the thrusters!

Shenzhou 7 is coming.

The spacecraft consists of an orbital module, a return module and a propulsion module, which constitute the Shenzhou-7 spacecraft with a total length of meters

The return capsule and the propulsion module are composed. The Shen-7 manned spacecraft weighs 12 tons. The Long March 2F launch vehicle and escape tower combination are as tall as a meter.

Orbital module - used as a working and living compartment for astronauts, and an airlock cabin for exiting the capsule. It is equipped with functions such as pressure relief control, extravehicular spacesuit support, etc. There are astronaut living facilities inside.

The top of the orbital module is equipped with a companion satellite and five repressurized gas cylinders. There is no track retention function.

Re-entry capsule - the module used for astronauts to return to Earth, connected to the orbital module. Equipped with parachutes and anti-thrust rockets for landing, a soft landing is carried out.

Propulsion Module – Contains the propulsion system, as well as a portion of the power, environmental control and communication systems, and a pair of solar panels.

For the first time, astronauts will be able to go out of space, master a variety of technologies, and prepare for future experiments and developments, and the dangerous mission is to prepare for the future and to explore space.

The mission of Shenzhou 7 is to be able to complete the manned mission. And then to be able to land safely, because the manned space project is very significant.

The mission of Shenzhou 7 is to complete manned spaceflight. As long as it can land safely, the mission of Shenzhou 7 will be completed perfectly.

In order to allow astronauts to go out of the capsule, it is necessary to master the technology of out-of-cabin activities, and it is also necessary to carry out relevant scientific investigations.

1. In the field of aerospace, Shenzhou 7 is of great significance as a milestone. Shenzhou-7 is the first step in the second step of the three-step strategy of China's manned space program, and it is a good outpost battle for China's establishment of a space station, and it plays an important role in the trilogy of China's aerospace industry.

2. In the field of national defense, it indicates that China has initially possessed the ability to conduct space defense warfare. Like the Shenzhou-6 spacecraft, Shenzhou-7 has the ability to change orbits in space, which plays a very important role in breaking through the enemy's ballistic missile defense system.

3. In terms of economic field, the industrial value of the Shenzhou-7 spacecraft is amazing. According to rough estimates, at present, through Shenzhou 5, the industrial value brought by Shenzhou 6 has exceeded 1200