72 km/h : 3,6 = 20 m/s
V = Vo + a .t
0 = 20 + 10 a
a = - 2 m/s², e módulo: 2 m/s²
Fr = m . a
Fr =1200 x 2
Fr = 2400 N
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72/3,6 = 20m/sV = V₀ + (a . t)
0 = 20 + a . 10
-20/10 = a
-2m/s² = a
F = m . a
F = 1200 . (-2)
F = -2400 N
72 km/h : 3,6 = 20 m/s
V = Vo + a .t
0 = 20 + 10 a
a = - 2 m/s², e módulo: 2 m/s²
Fr = m . a
Fr =1200 x 2
Fr = 2400 N