V - скорость
V=V0 + at
t=V/a
54км/ч=15м/с
t1=15/1=15c
t2=20c
t3=15/3=5c
S1=1*15^2/2= 112.5m
S2=15*20=300m
S3=3*5^2/2=37.5m
S(общ)=112.5+300+37.5= 450m
The end
V - скорость
V=V0 + at
t=V/a
54км/ч=15м/с
t1=15/1=15c
t2=20c
t3=15/3=5c
S1=1*15^2/2= 112.5m
S2=15*20=300m
S3=3*5^2/2=37.5m
S(общ)=112.5+300+37.5= 450m
The end