gsalih wrote:Thanks for your replies, i know that but i am more looking for a scientific explanation.
OK. F = ma describes the situation. From some imaginary reference point where we are close enough to think the earth flat, we see the earth moving to the left at about 1000 miles per hour. You, standing on the earth, are also. There are no left right forces acting on you, so you have no acceleration (change in motion) left-right. You jump up. You come down. There never were any left-right forces acting on you, so there was no acceleration. Your left-right position didn't change. This was first noted by Galileo back in , well a long time ago.
Now, if we back off far enough that we could see the earth rotating, we get a slightly different story. When you jump up, you keep your old velocity, but not your old acceleration. You would come down a few thousandths of an inch away (I don't really know how far. It includes rotation and I don't feel like calculating it this morning, but it's not far.). Still close enough enough for ordinary work.
You can see this by taking a tennis ball and getting on a subway car. Toss it up and it'll come down where it started. Now do this as you round a tight curve and you'll see it miss a little. Most subways don't go fast enough to see a big difference; you might have to go ride the carousel at the amusement park.