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пуля имевшая скорость 300м/с, застреляла в стенку. На сколько увеличилась внутренняя энергия пули и стенки, если масса пули 90г ?
Ответы 1
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Застрявшая пуля передала всю свои кинетическую энергию стенке, то есть энергия стенки увеличилась на W=m*v^2/2=0.09*300^2/2=4050 Дж (в дальнейшем эта энергия перейдёт в тепло).
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Автор:
martinez - 6 лет назад
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