Suppose a hole were dug from one side of Earth, through…
““Suppose a hole were dug from one side of Earth, through the center, and out the other side. What would happen to a man if he jumped into the hole? When he got to the middle of the Earth would he keep falling or would he stop? DEBBIE CANDLER RED BUD, ILLINOIS He would be vaporized by the 11,000° Fahrenheit temperature of the pressurized molten iron core. Ignoring this complication, he would gain speed continuously from the moment he jumped into the hole until he reached the center of Earth where the force of gravity is zero. But he will be traveling so fast that he will overshoot the center and slow down continuously until he reached zero velocity at the exact moment he emerges on the other side. Unless somebody grabs him, he will fall back down the hole and repeat his journey indefinitely. A one-way trip through Earth would take about forty-five minutes.””
About This Quote
This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.
A man falling through a frictionless tunnel through Earth would oscillate forever, accelerating toward the center then decelerating past it, ignoring heat and pressure extremes.
In simple terms: He would swing back and forth forever if not stopped.
Key Takeaway
Consider the limits of idealized physics.
Themes
physics
gravity
oscillation
thought experiment
Mood
curious
thoughtful
educational
Type
scientific
philosophical
When to use this quote
- Science museum demo
- classroom illustration
- public lecture
- media interview
Key Concepts
Newtonian mechanics
harmonic motion
energy conservation
Questions to Reflect On
- What does this reveal about ideal vs. real-world physics?
- How would friction change the outcome?
A Different Perspective
Real Earth conditions (heat, pressure, friction) would prevent the ideal motion.