Тело массой 2 кг, находящееся на высоте 3 м. обладает полной механической энергией, равной 80 дж. чему равна кинетическая энергия тела на этой высоте? (нужно полное решение с дано) заранее
Дано: | Е пот = mgh m = 2 кг. | Е пот = 2*9.8*3 = 58.8 Дж E пов. = 80 Дж| Е кин = Е пов - Е пот l = 3 м. | Е кин = 80-58.8=21.2 Дж g = 9.8 | ответ: 21.2 Дж | Е кин. - ?
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m = 2 кг. | Е пот = 2*9.8*3 = 58.8 Дж
E пов. = 80 Дж| Е кин = Е пов - Е пот
l = 3 м. | Е кин = 80-58.8=21.2 Дж
g = 9.8 | ответ: 21.2 Дж
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Е кин. - ?