The graph (top left) shows an example of curve fitting calculation of area under the curve. Curve fitting is the process of constructing a curve, or mathematical function, that has the best fit to a series of data points.
Area under the curve is the actual total force over time. The bar graph(bottom left) shows the 3 with similiar initial conditions (weight and velocity). Redemption has the most total force followed by First Strike and Graffiti. A less than 7% difference between the 3 was recorded.
The Table (below) shows that data plus the Kinetic Energy (KE) calculation in Joules (J) and Foot Pounds (ft-lbs) of force. Graffiti had the highest KE calculations, but the least total force. While Redemption had the lowest KE calculation but the highest total force. First Strike was right in between the two.