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v₂ = 2 v₁
a = 2 m/s²
s = 300 m
Szukane:
t = ?
v₁ = ?
Rozwiązanie:
Δv = at
v₂-v₁ = at
2v₁-v₁ = at
v₁ = at
s = at²
t² = s/a
t = √(s/a)
t = √(300/2) = √150 = 5√6 ≈ 12,25[s]
v₁ = at= 2×5√6 = 10√6 ≈ 24,5 [m/s]