samochod o masie 1oookg zwieksza predkosc z V1-18km/h do V2- 72km/h w czasie t-10 s. oblicz srednia sile dzialajaca na samochod

m = 1000 kg V₁= 18 km/h V₂ = 72 km/h ΔV = 72 km/h - 18 km/h=54 km/h ΔV = 54 km/h = 54000 m/3600 s = 15 m/s t = 10s F = ? F = m * a a = ΔV/t F = m * ΔV/t F = 1000 kg * 15 m/s / 10 s F = 1500 N = 1,5 kN [N] = [kg*m/s²]