Предмет: Физика, автор: albekbatov

первую половину пути по прямой жук прополз со скоростью v, оставшуюся часть пути-3v. Найти среднюю скорость жука!?

Аноним: ку ку

albekbatov: 26 вопросов осталосьъ

Аноним: и все не правильные )))

Аноним: дай по 6 классу)

albekbatov: нету

albekbatov: с 6 класса

Аноним: лан

Аноним: удачи)

albekbatov: спасиб

albekbatov: как тя звать?

Ответы

Автор ответа: RTA1414

Ответ: 3v/2.

Объяснение:

Пусть S - 1/2 пути, тогда 2S - весь путь.

v - скорость на 1/2 пути ⇒

S:v - время движения на первой половине пути;

3v - скорость на второй половине пути ⇒

S:3v - время движения на второй половине пути;

S:v + S:3v=(3S+S):3v=4S/3v - время движения на всём пути.

V средняя= 2S:4S/3v=2S*3v/4S=3v/2.

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