Предмет: Физика, автор: ihor16251115f

5. Кінетична енергія автомобіля, що рухається зі швидкістю 20 м/с, (2 бали) дорівнює 400 000 Дж. Обчисліть масу автомобіля.​

Ответы

Автор ответа: 1Manka1
0
Дано:
v=20м/с
Ек=400000Дж
Знайти:
m-?
Ек=mv²/2→m=2Ек/v²=2*400000/20²=2000кг

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