Rotation

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/rotation

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 earth's rotational speed at equator?Approximately 1,670 kilometers per hour (1,037 miles per hour)
2. What is rotation in physics?Rotation is when an object moves in a circle around a point or axis. It has a speed called angular velocity and can change when a torque is applied.
3. Why does an ice skater spin faster when they pull their arms in?When the skater pulls their arms close to their body, their moment of inertia decreases. With no external torque, the angular momentum stays the same, so the skater spins faster.

Angular Velocity: The rate of change of angular displacement; how fast an object rotates.
Torque: The rotational equivalent of linear force, causing an object to rotate or change its rotation.
Moment of Inertia: A measure of an object's resistance to changes in its rotational motion.
Angular Momentum: A measure of an object's rotational motion, analogous to linear momentum.