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Какую скорость приобретет свинцовый шарик массой 200 г, падая с высоты 20 м? На сколько градусов нагреется этот шарик, если считать, что вся механическая энергия шарика переходит в его внутреннюю энергию.
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Предмет:
Физика -
Автор:
soniamullins - 5 лет назад
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Ответы 1
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Ер=Ек mgh=mV^2/2 2gh=V^2 откуда V=(2gh)^(1/2)=20[м/с]Ер=Ек=U=C*m*дельта t mgh=C*m* дельта t откуда дельта t==g*h/C=10*20/130=1.5[градуса]
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Автор:
hannahren0 - 1 год назад
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