13. «Гумовий двигун»
Закручена гумова стрічка запасає енергію, з її допомогою можна приводити в дію, наприклад, авіамодель. Дослідіть властивості такого джерела енергії. Як його вихідна потужність змінюється з часом?
Популярні публікації
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Останні публікації
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