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Vi= 26m/s
Vf= 0m/s
t= 18 s
a=?
d=?
a= (Vf-Vi) / t
a= (0 m/s- 26 m/s) ÷ 18 s
a= (-26 m/s) ÷ (18 s)
a= -1.4 m/s²
d= Vi * t +1/2 a * t²
d=26 m/s * 18 s + 1/2(-1.4 m/s²) * (18 s)²
d= 468 m - 0.7 m/s² * 324 s²
d= 468 m - 226.8m
d= 241.2 m