If I fire a cannonball from the top of a mountain, traveling parallel to the Earth's surface at 14,000 miles per hour (6.26km/s), it travels a great distance before falling to Earth. If instead, I fire it at 16,000 miles per hour (7.15km/s) it:

A) travels completely around the Earth before returning to the mountaintop
B) drops to Earth immediately
C) travels the whole way to the Moon, orbits it once, then comes back
D) travels a much smaller distance before falling to Earth
E) travels exactly the same distance before falling to Earth


Ans: A) travels completely around the Earth before returning to the mountaintop

Physics & Space Science

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