S = (V2^2 - V1^2) / 2a = S = (V2^2 - V1^2) / (2 * (V2 - V1) / t) = (V2^2 - V1^2) * t / (2 * (V2 - V1)), откуда t = 2 * (V2 - V1) * S / (V2^2 - V1^2) или t = 2S / (V2 + V1)
t = 2 * (80 - 40) * 1 / (802 - 402) = 0,0167 ч = 1 мин.
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S = (V2^2 - V1^2) / 2a = S = (V2^2 - V1^2) / (2 * (V2 - V1) / t) = (V2^2 - V1^2) * t / (2 * (V2 - V1)), откуда t = 2 * (V2 - V1) * S / (V2^2 - V1^2) или t = 2S / (V2 + V1)
t = 2 * (80 - 40) * 1 / (802 - 402) = 0,0167 ч = 1 мин.