关闭发动机后,汽车做匀减速直线运动滑行进站,已知滑行120m时速

关闭发动机后,汽车做匀减速直线运动滑行进站,已知滑行120m时速度减小为原来的一半,再滑行8s静止.求汽车关闭发动机时的速度和滑行的距离

答案


20m/s,160m;
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