F = Av^2/400, for v
(Force of wind on a sail)
F = Av^2/400, for v
400F = 400(Av^2/400)
400F = Av^2
400F/A = v^2
√(400F/A) = v
20 √(F/A) = v
(Force of wind on a sail)
400F = 400(Av^2/400)
400F = Av^2
400F/A = v^2
√(400F/A) = v
20 √(F/A) = v