Friction
ICSE · Class 11 · Physics
All formulas from Friction in ICSE Class 11 Physics. Key equations, constants, and identities for board exam preparation.
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Formulas
2. Types of Friction and Coefficients
f_s^{max} = μ_s R
μ_s = f_s^{max}/R
f_k = μ_k R
f_r = μ_r · R/r
tanθ_s = μ_s
3. Motion on Rough Surfaces
F = μ_s mg/(cosθ + μ_s sinθ) = mg sinθ_s / cos(θ − θ_s)
F_least = mg sinθ_s = μ_s mg/(1+μ_s^2)^(1/2)
F = μ_s mg/(cosθ − μ_s sinθ) = mg sinθ_s / cos(θ + θ_s)
a = g(sinθ − μ_k cosθ)
μ = 2tanθ
4. Rolling Friction, Lubrication, and Reduction of Friction
f_r = μ_r · R/r
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