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Science · Grades 3–4

Friction

noun

A force that resists the motion between two surfaces in contact.

Example Sentences

"Friction between your shoe and the floor keeps you from slipping."

"Rough surfaces create more friction than smooth ones."

Synonyms & Related Terms

resistancedrag

Quick Check

Which best describes the meaning of friction?

Study Tips

To remember friction, try writing it in a sentence of your own. Connect it to something you already know about science.

Use it in conversation today — saying a word aloud three times helps lock it into long-term memory.