When an object is moving in a straight line with uniform acceleration, the average speed of the first half of the displacement is 3m / s, and the average speed of the second half is 6m / s, what is the speed when it passes through the middle position?
(1) According to the law of uniform acceleration linear motion, we can get: V2 − V20 = 2A · l2v2t − V2 = 2Al2, and because: V0 + V2 = 3m / SVT + V2 = 6, we can get: v = V20 + v2tv0 + VT = 32 + 623 + 6m / S = 5m / s
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