A bicyclist rides 5.7 km due east, while the resistive force from the air has a magnitude of 2.8 N and points due west. The rider then turns around and rides 4.6 km due west. The resistive force from the air on the return trip has a magnitude of 1.9 N and point due east.
(a) Find the work done by the resistive force during the round trip.
W= F * D
The Attempt at a Solution
2.8N+1.9N (4600m + 5700m) = wrong answer!!