If you could drill a hole through the Earth and drop an object into the hole, how would Earth's gravity affect the object and why?

A. The object would become stationary at the center of the Earth.

B.The object would fall out the other side.

C.The object would fall down from one side of the hole to the edge of the other side and then fall back down to the start. This pattern would continue forever.

D. The object will not fall into the hole because the object would be falling "up" to a viewer on the other side.

(Need answer today!)

C is TRUE if the hole could be maintained and air resistance is removed and if the earth did not spin causing the object to crash into the walls via Coriolis effect.

Most of the Coriolis effect could be eliminated by having the hole run north to south pole.

Building and maintaining the hole is not currently even possible because of the enormous heat and pressure deep in the earth. No known material has the strength at temperature to create or maintain such a hole. The deepest hole ever achieved so far is about 12 km. Earth has a radius of about 6400 km.

Removing the atmosphere to eliminate that friction would be even more challenging as nearly every known material will outgas atoms on occasion especially in very low pressures. The mass of earth and it's gravity will tend to hold onto those gasses.