Gravity train

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/gravity-train

1. What is the theoretical transit method?
2. What is the propulsion mechanism?
3. How does a gravity train move through the Earth?
4. How long does it take to travel from one side of the Earth to the other on a gravity train?

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the theoretical transit method?A straight tunnel through a planet's interior connecting antipodal surface points
2. What is the propulsion mechanism?Utilizes the planet's gravitational field for acceleration and deceleration
3. How does a gravity train move through the Earth?It starts at one surface point, gravity pulls it toward the center, speeding it up, then after passing the center gravity slows it down until it stops at the other side.
4. How long does it take to travel from one side of the Earth to the other on a gravity train?For a uniform Earth, the trip would take about 42.1 minutes, the same no matter which two opposite points you choose.

Antipodal Points: Points on the surface of a sphere that are directly opposite each other through the center.
Simple Harmonic Motion: Oscillatory motion where the restoring force is directly proportional to the displacement from equilibrium.
Momentum: The product of an object's mass and its velocity, representing its quantity of motion.