in a water tank involving the launching of a small model boat,the model's initial horizontal velocity is 20ft/s and its horizontal acce varies linearly from -40ft/s^2 at t=0 to -6ft/s^2 at t=t(1) then remains equal to -6ft/s^2 until t=1.4s.Knowing that v=6ft/s when t=t(1), determine the value of(adsbygoogle = window.adsbygoogle || []).push({});

t(1)

pls help.

the answer is 0.609s

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# Initial horizontal velocity of the boat

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