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Resistência do Ar

Resistência do Ar. Fatores que influenciam na resistência Velocidade Limite. Professor Thiago. 0 m/s. 10 m/s. P. 20 m/s. 30 m/s. 144 Km/h. 40 m/s. R AR = k .v 2. R. P. P. P. P. R AR = k .v 2 R AR = ½.d.A.C x v 2 d = densidade A = Área da secção transversal

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Resistência do Ar

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  1. Resistência do Ar Fatores que influenciam na resistência Velocidade Limite Professor Thiago

  2. 0 m/s 10 m/s P 20 m/s 30 m/s 144 Km/h 40 m/s

  3. RAR = k.v2 R P P P P RAR = k.v2 RAR = ½.d.A.Cxv2 d = densidade A = Área da secção transversal Cx=Coeficiente de arrasto aerodinâmico R R

  4. FR = m.a P- RAR = m.a P - k.v2 =m.a P - k.v2 = m.0 P - k.v2 = 0 P = k.v2 P V(m/s) VL R t(s)

  5. Exercício P273 (página 242) 1800N 1800N RAR 1800N RAR 1800N

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