19-12-2022
Physics

Answered

Груз массой 2 кг свободно падает с высоты 5 м.
а) Чему равна начальная потенциальная энергия груза?
б) Чему равна кинетическая энергия груза непосредственно перед касанием земли?
2. Пружина жёсткостью 120 Н/м растянута на 10 см.
а) Определите силу упругости пружины.
б) Определите потенциальную энергию пружины.
в) Какую работу надо совершить, чтобы растянуть пружину ещё на
20 см?

Answer :

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