A laminar boundary layer develops along a flat plate and

Question

A laminar boundary layer develops along a flat plate and its thickness at a particular point is δ = 0.1 m. If we approximate the boundary-layer velocity distribution by

then calculate the local shear τ and friction coefficient Cf. Assume that U∞ = 30 m/s, ρ = 1.2 kg/m³, and μ = 1.8 × 10^-5 N s/m².