A bicyclist rides 6.2 km due east, while the resistive force from the air has a magnitude of 2.7 N and points due west. The rider then turns around and rides 5.5 km due west. The resistive force from the air on the return trip has a magnitude of 2.2 N and point due east. Find the work done by the resistive force during the round trip. W = F*distance I figured I was given some vectors to work with: Vector A = 6.2 km E Vector B = 2.7 N W Vector C = 5.5 km W Vector D = 2.2 N E Vectors A and B directly affect each other, and Vectors C and D affect each other. Since W = F * distance: 6.2 km * -2.7 N = -16.74 J (negative N because it's pointing due West) 5.5 km * 2.2 N = 12.1 J (positive N because it's pointing East, positive km because distances can't be negative) -16.74 J + 12.1 J = -4.64 J (not the right answer) What am I doing wrong?