答案：

0-1=135° 200m

1-2=315° 400m

2-3=225° 200m

3-4=135° 200m

4-5=225° 200m

5-6=315° 400m

6-7=225° 200m

7-8=135° 200m

水平速度=36/3.6=10m/s