If you drop a stone into a hole drilled all the way to the other side of the Earth (neglect the molten core), the stone will
A) speed up until it reaches the other side of the Earth.
B) come to an abrupt stop at the center of the Earth.
C) speed up until it gets to the center of the Earth.
D) slow down until it reaches the center.

Question

Quizplus · Accepted Answer

The stone will speed up due to gravity until it reaches the center of the Earth, where its speed is greatest. After passing the center, gravity will decelerate it until it reaches the other side.

If You Drop a Stone into a Hole Drilled All