v1=20 м/с v2=15 м/с vc=?
t1=t2=t/2
S1=t*v1/2 S2=t*v2/2
vc=(S1+S2)/(t1+t2)=(t*v1/2+t*v2/2)/(t/2+t/2)=(v1+v2)/2=(20+15)/2=17.5 м/с (63 км/ч)
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v1=20 м/с v2=15 м/с vc=?
t1=t2=t/2
S1=t*v1/2 S2=t*v2/2
vc=(S1+S2)/(t1+t2)=(t*v1/2+t*v2/2)/(t/2+t/2)=(v1+v2)/2=(20+15)/2=17.5 м/с (63 км/ч)
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