以36km/h的速度沿平直公路行驶的汽车,遇障碍物刹车后获得大小为a

36 km/h的速度沿平直公路行驶的汽车,遇障碍物刹车后获得大小为a4 m/s2的加速度,刹车后第3 s内,汽车走过的路程为(  )

A12.5 m                                   B2 m 

C0.5 m                                    D10 m

答案

C

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