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MotionLab
How much resisting force friction generates between two surfaces in contact.
μ isn't a property of one object — it's a property of the pair of surfaces in contact. Rubber on dry pavement has a much higher μ than rubber on ice, which is exactly why braking distance changes so dramatically with road conditions.
The friction coefficient to overcome and start something moving (static) is usually higher than the friction coefficient once it's already sliding (kinetic) — this is why it's harder to start pushing a heavy box than to keep it moving once it's sliding.
Friction force (N)
30
F = μ · N
What you entered
F = μ × N
0.3 × 100= 30 NResult
Friction force (N): 30
With a 100N normal force and μ = 0.3, friction force is 30 N.