The initial velocity is 0.5 meters per second. The displacement in the sixth second is 4 meters more than that in the fifth second. The acceleration and the displacement in the fifth second are calculated

a=（S6-S5）/t^2=4/1^2=4 m/s^2
Displacement in five seconds s = VOT + 1 / 2at ^ 2 = 0.5 * 5 + 1 / 2 * 4 * 25 = 52.5m

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