Moment of inertia

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/moment-of-inertia

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 related physical quantity?Angular momentum (L), which is conserved in the absence of external torques
2. Why does a pizza take longer to spin than a coin?A pizza’s mass is farther from the center, so its moment of inertia is bigger. The farther the mass, the more resistance to spinning.
3. How do we calculate moment of inertia for a point mass?For a single point mass, multiply its mass by the square of its distance from the axis (I = m r²). The farther it is, the larger the value.

Angular Momentum: A vector quantity representing the product of moment of inertia and angular velocity.
Moment of Inertia Tensor: A 3x3 matrix describing the moment of inertia for a rigid body in three dimensions.
Radius of Gyration: The effective distance from the axis of rotation where the entire mass can be concentrated to produce the same moment of inertia.