F=F1-F2=2.5-2=0.5 кН= 500 Н
F= m×a
a= F/m= 500/5000=0.1 м/с^2
t= (V2-V1)/a=(20-15)/0.1=50с
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F=F1-F2=2.5-2=0.5 кН= 500 Н
F= m×a
a= F/m= 500/5000=0.1 м/с^2
t= (V2-V1)/a=(20-15)/0.1=50с