Robot = 150lb (120lb + battery + bumpers)
Max force available to move robot: 0.06 * 150lb = 9lb
Trailer ~ 40lb (from eye witness reports)
Drag on robot from trailer: 0.06 * 40lb = 2.4lbs
Total: 9 - 2.4 = 6.6lbs force
Total mass to move forward: 190lbs
I'll leave the acceleration calculations for you ...
Now tell me the top speed from rest when you slam into the wall after 50ft?
What's the maximum speed before you need to start braking so you don't crash?
How long did the traversal of the whole field take?
While braking, did you account for the center of mass moving forward over the front wheels? If so how fast could you brake? What happens if the trailer jack-knifes into the robot while braking?
So many questions, so little time!
