Shape of string transmitting wave along x - axis at some instant is as shown Velocity of point P is v = 4π cm/s and angle θ = tan–1 (0.004π)

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⟹ v = 10 m/s
λ = 100 cm = 1m
⟹ f = 10 Hz
vmax = Aω
⟹ A = 2mm