- #1
firin81
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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?