Предмет: Физика, автор: roman973

На расстоянии 200м собака увидела зайца .Через время она догонит его если скорость зайца 40км /ч а собаки 60км /ч. 10балов

Ответы

Автор ответа: xxxeol

1

Задача - "погоня".

Собака догоняет потому, что скорость у неё больше

1) Vc = V2 - V1 = 40-20 = 20 км/ч - скорость сближения (погони).

200 м = 0,2 км - перевод единиц длины.

2) Tc = S : Vc = 0.2: 20 = 0.01 ч = 0,6 мин = 36 сек - время "погони" - ОТВЕТ

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