Can Space Aircraft Reach Speed of Light in Vacuum?

In summary, the force applied to a plane in the atmosphere allows it to move forward by overcoming air pressure. In a vacuum, the force would cause the aircraft to accelerate without any friction from air pressure, resulting in continuously increasing speed. While it may seem possible for the aircraft to reach the speed of light with continuous force, this is not achievable due to the increasing inertia and the infinite amount of energy required.
  • #1
firin81
2
0
As we known, the force applied to the plane that fly in the atmosphere is to keep plane moving forward. The force given is to against the pressure of the air. If a space aircraft flies in the vacuum, the force given to it will accelerate aircraft because there is no friction caused by air pressure. Hence, the speed of aircraft will keep increasing. if we keep to give force to the aircraft, can the aircraft reach the speed of light?
 
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  • #2
firin81 said:
As we known, the force applied to the plane that fly in the atmosphere is to keep plane moving forward. The force given is to against the pressure of the air. If a space aircraft flies in the vacuum, the force given to it will accelerate aircraft because there is no friction caused by air pressure. Hence, the speed of aircraft will keep increasing. if we keep to give force to the aircraft, can the aircraft reach the speed of light?
If you put an aircraft in a vacuum it would not be able to accelerate at all!
 
  • #3
No, the inertia of an objec increases with its velocity.
 
  • #4
Hi Firin welcome to Physicsforums. :smile:

As measured from Earth, you could almost reach the speed of light with a spacecraft .
An infinite amount of energy would be needed to get it to reach exactly the speed of light.
 
  • #5
Thanks for all your comment.
 
  • #6
PeroK said:
If you put an aircraft in a vacuum it would not be able to accelerate at all!
Come on, this is not the point PeroK. :smile:
 

Related to Can Space Aircraft Reach Speed of Light in Vacuum?

1. Can a space aircraft travel at the speed of light in a vacuum?

No, according to Einstein's theory of relativity, it is impossible for any object with mass to reach the speed of light. As an object approaches the speed of light, its mass increases infinitely and it would require an infinite amount of energy to accelerate it further. Therefore, a space aircraft cannot reach the speed of light in a vacuum.

2. What is the fastest speed that a space aircraft can reach in a vacuum?

The fastest speed that a space aircraft can reach in a vacuum is approximately 17,500 miles per hour. This is the speed achieved by the Apollo 10 spacecraft during its return to Earth from the Moon.

3. How close can a space aircraft get to the speed of light in a vacuum?

A space aircraft can approach the speed of light, but it can never reach it. As an object's speed increases, its mass also increases, making it more difficult to accelerate it further. Therefore, the closer a space aircraft gets to the speed of light, the more energy is required to push it even closer.

4. Are there any theoretical ways to travel faster than the speed of light in a vacuum?

While there are some theories that suggest the possibility of faster-than-light travel, such as wormholes or warp drives, they are still purely speculative and have not been proven to be possible. Currently, it is believed that the speed of light is the ultimate speed limit in the universe.

5. Why is it important to understand the limitations of speed in space travel?

Understanding the limitations of speed in space travel is crucial for the safety and success of space missions. As an object approaches the speed of light, its mass increases, which can have a significant impact on the spacecraft's structure and ability to navigate. Additionally, the effects of time dilation and relativistic effects must also be considered when planning for space travel at high speeds.

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