Two trains pull a ship through a canal that has a length of 2.00 km. The trains are connected to the ship by two cables (each cable carries equally half of the tension). The cables make a 20° angle with the ship and the tension force in each cable is 5.00x10N. What is the total net work done on the ship by the two trains?
a) 9.4x10^6J
b) 1.88x10^7J