Предмет: Физика, автор: amilyachaaaa

Определите общую энерготела, если масса тела 2 кг. Скорость тела 20м/с, тело находится на высоте 20м

Ответы

Автор ответа: MatemaT123

1

Ответ:

$792 J$

Объяснение:

$E=E_{K}+E_{\Pi} \Rightarrow E=\dfrac{mv^{2}}{2}+mgh;$

$E=\dfrac{2 \cdot 20^{2}}{2}+2 \cdot 9,8 \cdot 20=20^{2}+2 \cdot 98 \cdot 2=400+392=792 (J);$

J — Дж.

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