汽车沿平直公路从甲地开往乙地,两地相距90km,开始时汽车以10m/s的速度行驶了1.5h,然后余下的路程要在45min

1个回答

  • (1)开始行驶的路程:s 1=v 1t 1=10m/s×1.5×3600s=54000m;

    (2)剩余路程:s 2=s﹣s 1=90000m﹣54000m=36000m=36km,

    v 2=

    =

    =48km/h