Предмет: Физика, автор: рлро3

четырехосный вагон с грузом имеет массу 32 т. рассчитайте давление оказываемте вагоном на рельсы если площадь соприкосновения колеса с рельсом равна 4 см2

Ответы

Автор ответа: KOMMYHU1CT

(не уверен что правильно)
И так по формуле давления: давление равно силу делить на площадь найдем давление: P=F\S, но перед этим все переведем в систему СИ:
Итак:P=320000\(0.0004*8)=100МПа
Ответ: 100МПа.
0.0004 мы умножили на 8 т.к. восемь колес т.е. по два на каждую ось, а их 4.
Слава СССР!

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