Per NCERT §4.10 eqn 4.22, the OPTIMUM speed (no friction needed) on a banked road of angle θ is which?
AR g tan θ
B√(R g / tan θ)
C√(μ R g)
D√(R g tan θ)
Answer & Solution
Correct answer: D. √(R g tan θ)
NCERT eqn 4.22: at optimum speed, horizontal component of normal force alone provides centripetal force. v₀ = √(Rg tan θ).
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