According to this definition, if the velocity of an object increases from V1 to V2 in t time, the acceleration is V2 − v1t. An existing small ball starts to move at an acceleration of 3m / S2 for 2S, then the velocity of the small ball at the end of 2S is () A. 0B. 2m/sC. 3m/sD. 6m/s

According to this definition, if the velocity of an object increases from V1 to V2 in t time, the acceleration is V2 − v1t. An existing small ball starts to move at an acceleration of 3m / S2 for 2S, then the velocity of the small ball at the end of 2S is () A. 0B. 2m/sC. 3m/sD. 6m/s

From a = vt − v0t: VT = V0 + at, because the initial velocity of the ball is zero, VT = at = 3m / S2 × 2S = 6m / s