Предмет: Физика, автор: pavlovaanna0481

Камень падает с башни с нулевой начальной скоростью. Первую половину пути камень пролетает за время 5 секунд. За какое время камень пролетит вторую половину пути? Действие всех сил, кроме силы тяжести, считайте пренебрежимо малым. Ответ приведите в секундах.

Ответы

Автор ответа: vvbarashovsky

дано t1=5 с h1=H\2

H\2=g*t1^2\2

H=gt^2\2

t^2\t1^2=2

t=t1√2=5*1,414=7,07с

t2=t-t1=2,07 с - ответ

ziczic252: Откуда взялась эта формула: t^2\t1^2=2 ?

vvbarashovsky: вторую формулу поделить на первую

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