What must occur simultaneously for a cannonball launched from a tower to enter orbit?

Answer

The planet’s surface curves away beneath it at the exact same rate as the fall

A stable orbit is achieved when the rate at which the object falls towards the Earth matches the rate at which the curvature of the Earth moves away from the object's path.

What must occur simultaneously for a cannonball launched from a tower to enter orbit?

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How Do Satellites Get & Stay in Orbit? - YouTube

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