Олимпиадный физический минимум для семиклассника. 9 шагов к успеху. Н. В. Ларионова

Олимпиадный физический минимум для семиклассника. 9 шагов к успеху

40 сек – 58м, и за последние 30 сек – 45 м. Определить скорость движения на каждом участке и найти среднюю скорость за всё время движения.

2. Первую половину пути Баба-Яга летела со скоростью 20 км/ч. Затем погода испортилась, и половину времени Яга пролетела со скоростью 10 км/ч. В довершение всего у неё сломалась метла, и пришлось оставшееся время идти пешком со скоростью 5 км/ч. Найти среднюю скорость бабушки.

3. Турист первую треть всего времени шёл по грунтовой дороге со скоростью V₁

Конец ознакомительного фрагмента.

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