For an object moving in a straight line with uniform acceleration, if the initial velocity V0 is 2.0 M / s, and the displacement it passes through in the third second is 4.5 m, then its acceleration is 0______ ．

For an object moving in a straight line with uniform acceleration, if the initial velocity V0 is 2.0 M / s, and the displacement it passes through in the third second is 4.5 m, then its acceleration is 0______ ．

The displacement of the object in the first three seconds: X3 = v0t + 12at2 = 2 × 3 + 92a, the displacement of the object in the first two seconds: x2 = v0t + 12at2 = 2 × 2 + 2a, the displacement of the object in the third second is 4.5m, so there is: x3-x2 = 4.5m, so the acceleration a = 1m / S2, so the answer is: 1m / S2