PHYSICS CHAPTER 8 : Universal Gravitation

If the ball goes just fast enough, after one second, it will reach a point where Earth has curved 4.9 m away from the horizontal. That is, the curvature of Earth will just match the curvature of the trajectory, and the ball will orbit Earth. The drawing shows that Earth curves away from a line tangent to its surface at a rate of 4.9 m for every ... ................
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