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johncena
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Imagine we are in a spacecraft which is moving with a constant velocity in empty space. If we are not influenced by any gravitational forces, and if we restart the engine, will it be accelerated ?
johncena said:How it can be accelerated without an external force ?
Yes, objects can accelerate in space. According to Newton's second law of motion, an object will accelerate when a net force is applied to it. In space, there is no air resistance or friction to slow down objects, so they can accelerate for longer periods of time compared to objects on Earth.
Acceleration in space is different from acceleration on Earth because there is no air resistance or friction in space. This means that objects can accelerate for longer periods of time and reach higher speeds in space compared to on Earth.
Yes, you need fuel to accelerate in space. In order to accelerate, a force must be applied to an object, and in space, this force is typically provided by rockets or thrusters that use fuel to generate thrust. Without fuel, it is not possible to accelerate in space.
No, it is not possible to accelerate to the speed of light in space. According to Einstein's theory of relativity, the closer an object gets to the speed of light, the more energy is required to accelerate it further. This means it would require an infinite amount of energy to reach the speed of light, which is not possible.
Yes, there is a limit to how fast we can accelerate in space. This limit is determined by the amount of energy and thrust available. As an object approaches the speed of light, it becomes increasingly difficult to accelerate it further, so there is a practical limit to how fast we can go in space.