Friction Coefficient Calculator

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Calculate the coefficient of friction between two surfaces using force measurements.

Friction Measurements

Calculation Mode

Friction Force (F_f) (N)

Normal Force (F_n) (N)

Or calculate from mass:

Mass (m) (kg)

Coefficient Analysis

Enter parameters to calculate friction coefficient

About this calculator

Quick Reference

μCoefficient of friction (dimensionless)

F_fFriction force (N)

F_nNormal force (N)

μ_sStatic friction coefficient

μ_kKinetic friction coefficient

μ_s > μ_kStatic > kinetic for same surfaces

Overview

The coefficient of friction (μ) is a dimensionless scalar value that describes the ratio of the force of friction between two bodies and the force pressing them together. It depends on the materials and surface conditions.

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Pro Tips

Static friction coefficient (μ_s) > kinetic friction coefficient (μ_k)
Normal force equals weight on horizontal surfaces: F_n = mg
Coefficient of friction is typically between 0.1 and 1.0
Lower values mean less friction (like Teflon), higher values mean more friction
Values depend on surface roughness, materials, and lubricants

Fun Facts

"Teflon has one of the lowest friction coefficients (0.04-0.05)"
"Rubber on dry asphalt has a coefficient around 0.7-0.9"
"Ice has a very low coefficient of about 0.02-0.1"
"The coefficient of friction for human skin is about 0.3-0.6"
"Lubricants can reduce friction coefficients by 100x or more"

Formula: μ = F_f / F_n