Предмет: Физика, автор: vitalinatagaeva09

Пожалуйста помогите очень срочно за 10 минут!!! Задача по физике: знайдіть масу автомобіля який рухається зі швидкістю 72 км/ч якщо його кінетична енергія дорівнює 40 кДж

Ответы

Автор ответа: kim08an

Объяснение:

Дано

v=72 км/ч=20м/с

Ек=40кДж=40×10³Дж

Найти

m=?

Решение

Eк=m×v²/2

m=2×Eк/v²

m=(2×40×10³)÷20²=80000÷400=200кг

Ответ: 200кг

vitalinatagaeva09: Спасибо большое

kim08an: рад помочь

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