Предмет: Физика, автор: katerinachernukh

Из дома,который стоит на расстоянии 500м от леса,со скоростью 2м/с выходит Красная Шапочка и идет к лесу.Одновременно навстречу ей из леса выходит Серый Волк со скоростью 5м/с .На расстоянии 100м от дома Красная Шапочка заметила Волка и побежала к дому со скоростью 4м/с.На каком расстоянии от дома Волк догонит Красную Шапочку?

Ответы

Автор ответа: kimserega14

Если волк не увеличит скорость, то он вообще не догонит Красную Шапочку. Поясню:
100 метров Красная Шапочка преодолеет за 100/2=50 секунд
На обратный путь до дома (те же 100м) ей понадобится 100/4=25 секунд
Суммарное время 50+25=75 сек
Волк за это время преодолеет расстояние от леса 75*5=375 метров.
То есть при такой скорости волка он даже не достигнет того места, где Красная Шапочка его заметила, в то время как она уже успеет вернуться домой.

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