Einstein, Newton and the Bullet
You are a weapons manufacturer and you have just developed a gun that fires a bullet at 0.9c (c is the speed of light, y’know – e=mc2 and all that…?)
You are having a chat with a friend of yours who has just developed a new car that travels at 0.9c (It’s a Toyota Avensis…)
During this chat you both come to a minor stumbling block…. You are a passenger in your friends Avensis, travelling at 0.9c, and you fire your new gun, forward along the axis of travel…
At what speed is the bullet travelling….?