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x = 25 m
t = 25 s
ditanya : a = ... ?
dijawab : x = v₀t +1/2 at²
25 = 5 . 25 + 1/2 . a . 25²
25 = 125 + 625a/2
25 - 125 = 625a/2
-100 = 625a/2
-200 = 625a
-200/625 = a
-0,32 = a
a = -0,32 m/s²
(minus menandakan benda mengalami perlambatan sebesar 0,32 m/s²)