A projectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = - 16t^2 + 576t. After how many seconds does the projectile take to reach its maximum height? Show your work for full credit.

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PauRebedoKaitlynNo PauRebedoKaitlynNo

13-07-2016
Physics

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A projectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = - 16t^2 + 576t. After how many seconds does the projectile take to reach its maximum height? Show your work for full credit.

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meerkat18 meerkat18 · Answer 1 · 2016-07-18T15:29:17+02:00

The time required for the maximum height to be attained is calculated by differentiating the given equation and equating the derivative to zero.
h(t) = -16t² + 576t
dh(t) / dt = 0 = (-16)(2)t + 576
The value of t from the equation is 18. Thus, after 18 seconds the projectile reaches its maximum height.