Предмет: Физика, автор: lexdemrus

Два спортсмена выбегают по прямой дороге в одном направлении. Первый бежит со скоростью 4 м/с, второй - со скоростью 5 м/с. Начальное расстояние между спортсменами 4.5 км. Через какой промежуток времени t (в минутах) второй спортсмен догонит первого?

Ответы

Автор ответа: Владстарс

2

V1 - 4 м/c
V2 - 3 м/с
S = 4500 м.

V1 - v2 = 1 м/с
1 * 4500 = 4500 с = 7,5 минут

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