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ajuatatima pls problema 9
e pt. olimpiada


Ajuatatima Pls Problema 9e Pt Olimpiada class=

Răspuns :

x1=v1t

x2=d-v2(t-Δt)

x1=x2=>v1t=d-v2(t-Δt)<=>54t=d-72t+12<=>126t=12+d=>t=(12+d)/126

x1=d/2=v1t<=>d/2=(12+d)/126<=>d=(12+d)/63<=>63d=12+d<=>62d=12=>d=0,193 km=193 m

t=(12+0,193)/126=12,193/126=0,096 h=5,8 min