Предмет: Физика, автор: annayartsun

пуля массой 5г движется со скоростью V1= 200м/с и ударяется в куб массой 100г, вылетает из него со скоростью V2 = 100г, определить внутреннюю энергию

Ответы

Автор ответа: FREEDOM1TeddY

Полная механическая энергия до ударения
W=Ek=mv^2/2
W=5*10^-3*4*10^4/2=100Дж
После удара его W=Ek2+U
Ek2=5*10^-3*10^4/2=25Дж
Вывод: 75 Дж ушло на изменение внутренней энергии

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