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a=Vk-Vp÷t
t=2s
Vk= 70km/h
Vp= 0km/h
ΔV=70km/h-0km/h= 70km/h
a=70km/h÷2s
70km/h * 1000m/1km * 1h/3600s =175m/9s
a=175m/9s ÷ 2s
a=175m/9s * 1/2s
a=9,7(2)m/s²