Ptt 大爆卦 | 5't in meters - 前往 https://www.sarthaks.com/393750/the-height-h-in-meters-of-an-object-varies-with-time-t-in-seconds-as-h-10t-5t-2

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The height h in meters of an object varies with time 't' in ...

dh/dt = 10 - 10t. d 2 h/dt 2 = - 10 < 0. => only macima. dh/dt = 0 => t = 1 sec. hmax = 10(1) - 5(1)2. hmax = 5 meter.

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