Poprosze o rozwiązanie zadań w załączniku
Zad 19.
Zad 18.
a)
b)
c)
Zadanie 19.
Dane:
V = 10m/s
a = 3m/s²
ΔV = |V₁ - V₂| = |10 - 16| = |-6| = 6m/s
Szukane:
Δt = ?
Wzór i obliczenia:
a = ΔV/Δt
Δt = ΔV/a
Δt = 6/3 = 2s
Zadanie 20.
ΔV = 6m/s
Δt₁ = 3s
a = ?
a = ΔV/Δt₁
a = 6/3 = 2m/s²
Δt = 7s
a = 2m/s₂
V₀ = 0
s = ?
s = V₀Δt₁ + ½aΔt₁²
s = 0*7 +½*2*3² = 9m
s₁ = 49m
V = 6m/s
Δt₂ = 7s
s₂ = ?
s = s₁ + s₂
V = s₂/Δt₂
s₂ = VΔt₂
s₂ = 6*7 = 42m
s = 9+42 = 51m
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Zad 19.
Zad 18.
a)
b)
c)
Zadanie 19.
Dane:
V = 10m/s
a = 3m/s²
ΔV = |V₁ - V₂| = |10 - 16| = |-6| = 6m/s
Szukane:
Δt = ?
Wzór i obliczenia:
a = ΔV/Δt
Δt = ΔV/a
Δt = 6/3 = 2s
Zadanie 20.
a)
Dane:
ΔV = 6m/s
Δt₁ = 3s
Szukane:
a = ?
Wzór i obliczenia:
a = ΔV/Δt₁
a = 6/3 = 2m/s²
b)
Dane:
Δt = 7s
a = 2m/s₂
V₀ = 0
Szukane:
s = ?
Wzór i obliczenia:
s = V₀Δt₁ + ½aΔt₁²
s = 0*7 +½*2*3² = 9m
c)
Dane:
s₁ = 49m
V = 6m/s
Δt₂ = 7s
Szukane:
s₂ = ?
s = ?
Wzór i obliczenia:
s = s₁ + s₂
V = s₂/Δt₂
s₂ = VΔt₂
s₂ = 6*7 = 42m
s = 9+42 = 51m