A train is moving with uniform acceleration. The two ends of the train pass through a point on the track with velocity `v_(1)` and `v_(2)`. With what velocity the middle point of the train would pass through the same point ?
A. `[(v_(1)^(2)+v_(2)^(2))/(2)]^(1)/(2)`
B. `((v_(1)^(2)-v_(2)^(2)))/(2)`
C. `(v_(1)+v_(2))/(2)`
D. `(v_(1)-v_(2))/(2)`
