Предмет: Физика, автор: Serega211161

По двум параллельным
железнодорожным путям равномерно едут два поезда: грузовой длиной 860 м со скоростью 54 км/ч и пассажирский
длиной 180 м
со скоростью 90 км/ч.
В течение какого времени один поезд проходит мимо другого?

Ответы

Автор ответа: MashaPutnaj

Дано V1=15 м/с V2=25 м/с L1=180 м L2=860 м t -?

если поезда двигаются в одном направлении

t=(L1+L2)/(V2-V1)=(180+860)/10=1040/10=104 с

если поезда двигаются навстречу друг другу

t=(L1+L2)/(V1+V2)=1040/35=29,7 c

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