Friction Interactive Simulation

Friction is a force that resists sliding between two surfaces. It equals the coefficient of friction (μ) times the normal force pressing the surfaces together (f = μN). Rough surfaces (high μ) produce more friction; pressing harder also increases it. Students can change coefficient of friction and normal force and compare what happens. Use it for physics inquiry with Grades 4–5, Middle School, and High School on a projector or student device.

Standards: NGSS MS-PS2-2

• How a rougher surface (higher μ) creates more friction
• Why pressing objects together harder increases friction
• Reading f = μN with your own values
• How friction can prevent sliding (static friction) or slow motion (kinetic friction)

1. 1Predict how changing coefficient of friction will affect the friction force, then test the prediction.
2. 2Use evidence from the live calculation and visual to explain the result.

Questions teachers ask