The average velocity in the first second is 1.2 m / s, and the average velocity in the second second is 1 m / s. The acceleration and total displacement of an object are calculated

The average velocity in the first second is 1.2 m / s, and the average velocity in the second second is 1 m / s. The acceleration and total displacement of an object are calculated

The average speed in the first second is 1.2m/s, and the average speed in 0.5s is 1.2s/s
If the average velocity is 1 m / s in the second second second, the velocity is 1 m / s in 1.5 second
So the acceleration is a = (1-1.2) / (1.5-0.5) = - 0.2m/s
It can be known that the initial velocity is 1.3m/s
It can be known that the total displacement of 2S is s = 1.3 * 2 - (?) 189; * 0.2 * 2 - (?) 178; = 2.2m