When the vehicle starts from a standstill with an acceleration of 2m / S2, what is the speed of the vehicle at the end of the fifth second? What is the average speed of the car in the fifth second? What is the displacement of the car in the fifth second?

The speed at the end of the fifth second is: v = at = 2 × 5m / S = 10m / S; the displacement in the fifth second is: X5 = 12at52 − 12at42 = 12 × 2 × (25 − 16) M = 9m. Then the average speed in the fifth second is: v = x5t5 = 91m / S = 9m / s. A: the speed of the car at the end of the fifth second is 10m / s, the average speed in the fifth second is 9m / s, and the displacement in the fifth is 9m

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