The BIG Push !: Pushing Me Around!

EXP 4:   NEWTON'S SECOND LAW OF CARS

Friday we accelerated my car ( and me) by pushing with the different combinations of people.
We measured that the ratio of Actual Push versus Push measure in lab was 0.76 
We accelerated the car with constant (?) acceleration for 10 meters and measure the time of the push.
To do:
Download the data to your computer by clicking here:  Car Push Lab Data

Open the Excel file or import into graphical analysis . Complete the table especially for Total Force and Acceleration.
Use this data to graphically find the mass of my car.   
Show examples of each calculation.
Consider how many significant figures are really justified by our estimates.  
Consider the range of uncertainty  of each measurement. 
Comment on:  the accuracy of our approximations.  Was the acceleration constant?  Research the actual value.