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Answer:
a) a= -1.5 m/s²
b) t = 4.0 s
Explanation:
a)
[tex]v_{f} ^{2} - v_{o} ^{2} = 2*a*\Delta X (1)[/tex]
[tex]a =\frac{-(v_{o}^{2})}{2*\Delta X} = \frac{-(6.0m/s)^{2} }{2* 12.0m} = -1.5 m/s2 (2)[/tex]
b)
[tex]\Delta t = \frac{-v_{o}}{a} = \frac{-6.0m/s}{-1.5m/s2} = 4.0 s (2)[/tex]