Oblicz jaką siłą należy działać,aby w czasie 4s ciało o masie 20 kg rozpędzić od 32 km/h do 108 km/h.
t = 4s
m = 20kg
V₁=32km/h=8,89m/s
V₂=108km/h = 30m/s
ΔV=V₂-V₁=30m/s-8,89m/s=21,11m/s
F=m*a = 20kg*5,28 m/s² = 105,6N
a=ΔV/t = 21,11m/s / 4s = 5,28 m/s²
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t = 4s
m = 20kg
V₁=32km/h=8,89m/s
V₂=108km/h = 30m/s
ΔV=V₂-V₁=30m/s-8,89m/s=21,11m/s
F=m*a = 20kg*5,28 m/s² = 105,6N
a=ΔV/t = 21,11m/s / 4s = 5,28 m/s²