I read that a space ship can reach 5,100g in space. Is there a way to determine how many kilometers per hour this would be? As I understand it, the only way to feel g force is to be accelerating. The acceleration should slow down as speed increases and eventually stop so there would be 0g at that point. I saw somewhere that 5,100g would be equal to 51,000kph but there was no explanation as to how the anwer was calculated.