amandaf0316 amandaf0316

05-02-2021
Mathematics

contestada

a ball is thrown from a height of 40 meters with an initial downward velocity of 5 m/s

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slimegaming1234567 slimegaming1234567

05-02-2021

0=40-10t-5t^2

t^2+2t-8=0

(t+4)(t-2)=0

t=-4 (not a solution) or t=2

Answer: after 2 seconds

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