Imagine that a 20 mile diameter hole is bored along the diameter of the Earth extending from the North Pole to the South Pole, that all air and gases are pumped out of this hole, and that the temperature throughout this hole is maintained at 300 Kelvins. A boy throws a ping pong ball into this hole. The ping pong ball would: w) fall to the center of the Earth and remain forever suspended there. x) fall to the opposite side of the Earth's surface and remain forever suspended there. y) forever oscillate in simple harmonic motion along the hole between the loci of the hole with the opposite surfaces of the Earth. z) none of the above.

Imagine that a 20 mile diameter hole is bored along the diameter of the Earth extending from the North Pole to the South Pole, that all air and gases are pumped out of this hole, and that the temperature throughout this hole is maintained at 300 Kelvins. A boy throws a ping pong ball into this hole. The ping pong ball would: w) fall to the center of the Earth and remain forever suspended there. x) fall to the opposite side of the Earth's surface and remain forever suspended there. y) forever oscillate in simple harmonic motion along the hole between the loci of the hole with the opposite surfaces of the Earth. z) none of the above. 
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Answer :

ANSWER: Y -- FOREVER OSCILLATE IN SIMPLE HARMONIC MOTION ALONG THE OLE
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