3 years ago

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

Mathematics

1 answer:

arsen [322]3 years ago

7 0

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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