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How long will it take?

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2 Answers

vf=vi+a*t
 
vi=4.24 m/s
vf=-2.23 m/s (why negative?)
a=-1.32 m/s2
 
Solve for t.
 
 
V = Vo + at
-2.23 = 4.24 - 1.32t
Solve for t,
t = 4.90 sec <==Answer