Reaction force

Summary: Solid materials, like a chair or the floor, are only compressed a very small amount when you apply a force to them. The support force from a chair or the floor is called the reaction force or the normal force. Tags: science student-book-7 physics Created: 2026-05-21 Last Updated: 2026-05-21

Reaction force

Solid materials, like a chair or the floor, are only compressed a very small amount when you apply a force to them. The support force from a chair or the floor is called the reaction force or the normal force.

Source

This concept is from the [Science Student Book 7](Science Student Book 7/Physics/Forces/1.2 Squashing and stretching.md), Physics section.