Предмет: Физика, автор: govher02

начальная скорость автомобиля массой 2 т равна 36 км/ч Какую работу совершает силу трения при экстренном торможении до полной остановки?

Ответы

Автор ответа: mishunya4234

Відповідь:

100 кДж

Пояснення:

Ек (автомобиля)= W(сила трения) /// то есть кинетическая энергия автомобиля это то что нужно остановить трению, поэтому величины равны

2т = 2000 кг

36 км/ч = 10 м/с

Ек = (mV²) / 2 = (2000 * 10²) / 2 = 100000 Дж = 100 кДж

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