>>40627971
Stand in a train going 50mph Toss a ball at 20mph towards the front of the train. The ball will make it to the front of the train despite going slower than the speed of the train.
Why?
Because the momentum of the object you are standing on is added to the momentum of anything launched from it. If you measure the speed of the ball from on the train it will measure as going 10mph because from the speedometer's perspective, it is.
If you fire a bullet from the earth, just like the ball on the train, the speed of the earth's rotation is applied to the bullet. The bullet's speed is measured as 420 meters per second is because just like the ball, the bullet is measured by a device that is already moving with the earth's speed.
GENUINELY how did you get far enough in life to be posting here without knowing this already?
