避免不了相撞的。
http://www.racemath.info/motionandenergy/stop_distance.htm
The table shows typical stopping distances included in the Highway code
Speed (mph) |
20
|
30
|
40
|
50
|
60
|
70
|
80
|
Thinking Distance (m) |
6
|
9
|
12
|
15
|
18
|
21
|
24
|
Braking Distance (m) |
6
|
14
|
24
|
38
|
54
|
75
|
96
|
Total Stopping Distance (m) |
12
|
23
|
36
|
53
|
72
|
96
|
120
|