When a car moves at a constant acceleration of 0.5m/s2, passing through two points AB 125m apart for 10s, the speed of the car after passing through point a for 5S is 0.5m/s2

S=vt+（1/2）at^2
V=10m/s
v1=v+at=10+0.5*5=12.5m/s

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