In physics, the friction (f)
(in newtons, N) is directly
proportional to
• Coefficient of friction (μ)
(no unit)
• Upthrust from ground due to
the weight of object (N)
(in newtons, N).
• Smoother surfaces,
Smaller coefficient of friction,
Smaller friction.
• Bigger weight,
Bigger upthrust from ground,
Bigger friction.