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Человек идёт по эскалатору вверх. Если эскалатор неподвижен, то человек поднимается за 100 с. Если при этом эскалатор движется, то человек поднимается за 25 с. Длина ленты эскалатора 50 м. Какова скорость эскалатора?
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Предмет:
Физика -
Автор:
ajaxtaylor - 5 лет назад
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Ответы 1
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S=50мt1=100cv1=1/2 м/с = v человекаt2 = 25cv2 = 50/25=2м/с = v человека + v эск => vэск = 2 - 1/2 = 1 1/2 м/с
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Автор:
alejandrolee - 5 лет назад
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It happened in the Middle Ages in a small town in Germany. The citizens of the town 1(worry) by the great number og rats which 2(give) the people no peace day band night. No one knew from where the terrible animals 3(come) to the town or how they could 4(destroy), because none of the means that already 5(use) against the rats were of much help. The citizens went to the Mayor and said: "We 6(lose) all patience. If you 7( not take) radical steps you 8(not remain) our Mayor!"
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