Предмет: Физика, автор: jerichon

Автомобиль, двигаясь равномерно, проходит путь 20 м за 4 с, после чего он начинает тормозить и останавливается через 15 с. Определите ускорение и тормозной путь автомобиля

Ответы

Автор ответа: grayng

20 метров за 4 секунды, V = 20/4 = 5 м/сек
V = 0 - at
a = 0 - V/t = 5/10 = - 0,5 м/сек²
S = V₀t + at²/2
S = 5*10 - 0,5*100/2 = 50 - 25 = 25 м - тормозной путь.

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