Решение задач по физике: Автомобиль, двигаясь равнозамедленно, проходит за 5 сек 5 метров и останавливается.

Автомобиль, двигаясь равнозамедленно, проходит за 5 сек 5 метров и останавливается. Определите путь пройденный за 3 секунду

$S=v_0t-\frac{at^2}{2}$ $5=v_0*5-\frac{a*5^2}{2}$ (1)
$25a-10v_0+10=0$ (2) This is the rendered form of the equation. You can not edit this directly. Right click will give you the option to save the image, and in most browsers you can drag the image onto your desktop or another program.

This is the rendered form of the equation. You can not edit this directly. Right click will give you the option to save the image, and in most browsers you can drag the image onto your desktop or another program.

(3)

(4)

Имеем систему двух уравнений (3) и (4) с двумя неизвестными. Решаем подстановкой:

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м/с^2 (5) This is the rendered form of the equation. You can not edit this directly. Right click will give you the option to save the image, and in most browsers you can drag the image onto your desktop or another program.

м/с

Путь за третью секунду равен разности пути за три секунды и за две секунды:
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