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Vk=450cm/min
t=10s
a=(Vk-Vp)/t
Vk-Vp= 450cm/min-30cm/min=420cm/min
V=420cm/min
420cm/min=420×0,01m÷60s=0,07m/s
a=v/t
a=0,07m/s ÷ 10s
a=0,007m/s2
a=3m/s2
t=12s
s=(a×t2)/2
s=[3m/s2×(12s)2]/2
s=[3m/s2×144s2]/2
s=432m/2
s=216m