Rolling

High school (ages 12+)
Thinking & Learning

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/rolling

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 energy dissipation mechanism?Rolling resistance arises from material deformation and hysteresis at the contact point
2. What is the historical significance?The wheel, a key application of rolling, revolutionized transportation and civilization
3. What is rolling motion and how is it different from sliding?Rolling motion mixes spinning and moving forward. The spot where the object touches the ground stays still, unlike sliding where the whole surface slides.
4. Why is rolling cooler than sliding?Rolling uses much less energy because the contact point only deforms a little. This means less friction and less power needed to keep moving.

Angular Velocity: The rate at which an object rotates or spins around an axis.
Hysteresis: The phenomenon where the state of a material depends on its past history of applied stress.
Tribology: The scientific study of friction, wear, and lubrication of interacting surfaces.