Imagine if there are no celestial bodies in space, and there is a rocket in there,which is rest, would it move if we turn

June 2023 1 4 Report

Imagine if there are no celestial bodies in space, and there is a rocket in there,which is rest, would it move if we turn ON its thrusters?

Answer:

Law 1: A body will remain at rest or in motion in a straight line unless acted upon by a force.

Law 2: A change in motion is proportional to the applied force and parallel to it.

Law 3: For every action, there is an equal and opposite reaction. The best example of this is Newton’s cradle balls.

Once a rocket is in space, it will not experience any drag, which airplanes have to handle. Therefore, if the engines are shut down, the spacecraft will coast along the same path it was on when the engines were running, due to the first law of motion.
Unless it is hit by an external object, which would exert the “force” that the law of motion talks about, or it comes close to a planetary object that can exert a gravitational force on the object, it will continue on the same path.

We encountered the application of this law when we considered examples of pushing on a surface to direct motion. Rockets propel themselves using fuel that generates high-pressure gas. The movement of the exhaust gases away from the rocket body pushes the rocket in the forward direction, since the force exerted by the exhaust gas has an equal reaction in the opposite direction.
So, if the spacecraft has to turn left, the right-side propellers on the craft need to be ignited. In fact, it is easier to maneuver a spacecraft in space than in normal air. As the exhaust gas leaves the rocket engine, it must push away the surrounding air, which uses up some of the energy of the rocket. In space, the exhaust gases can escape freely.
However, the fuel that produces the exhaust gases that propel the rocket will also require oxygen in order to burn. As we’ve already mentioned, the vacuum of space has no oxygen, so how do you ignite the fuel?

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