Two teams of nine members each engage in tug-of-war. each of the first team's members has an average mass of 66 kg and exerts an average force of 1350 n horizontally. each of the second team's members has an average mass of 71 kg and exerts an average force of 1369 n horizontally. (assume that the winning team is moving backwards as they pull, while the losing team is moving forwards as they are pulled.)