I went to the Southwest Airlines Pigskin Plane Pull on Thursday. They get two teams of 16, one team of U-Texas Fans and one team of Oklahoma U Fans, and see who can pull a 737-700 50 yards the fastest. The OU team won, getting a time of 40 seconds. A Boeing 737-700 weighs roughly 83,000 lbs, which equates to about 37,648 kg. 50 yards is 45.72 meters. I am trying to figure out the basics of the winning pull. it has been awhile since Physics in high school and im running into some problems. Here is what i have so far:

T=40 seconds

D=45.72 Meters

Vo=0

Vave= D/T, Vave = 45.72m/40sec, Vave = 1.143 m/s

PE=MA, PE = 37,648.2kg(9.8m/s^2), PE = 368,952.36 kg m/s^2 (or newtons) at rest.

I am trying to figure out how to determine Velocity Final, acceleration, and then moving on to figure out how much work was exerted on the 737 over the 50 yards, and the kinetic energy of the 737 at the end of the pull. the formula i have found and tried to use for the acceleration and Vf is:

V^2=Vo^2+2ax

I come up with an acceleration of .0143m/s^2. But the Vf has to have been faster then the average speed of 1.143m/s. And then the acceleration that i have is wrong. arghh. I just cannot seem to figure out how to solve this problem. Thank you in advance.