Why You Weigh Less at the Equator
You probably know that gravity is less on the moon than on Earth. Weight is a measure of the force of gravity pulling on an object, so you’d weigh less on the moon than on Earth. But gravity is the same all over Earth, right?
The Back Story
- Actually, Earth’s gravity is not as uniform as you might think. Several factors cause gravity to vary around the globe.
- Newton’s law of gravity explains how some of the factors affect Earth’s gravity. Watch this video to review Newton’s law:
Can You Apply It?
At the links below, learn more about variations in Earth’s gravity. Then answer the questions that follow.
- State Newton’s law of universal gravitation.
- State in your own words how the gravity between two objects varies with the distance between them.
- How and why does Earth’s gravity change with latitude?
- Why would you weigh less at the equator than at the poles?
- How does altitude affect Earth’s gravity? Why?
- Would you weigh more or less at the top or the bottom of a tall mountain? Explain.