1. The problem statement, all variables and given/known data Two railroad cars, each of mass 1.6 104 kg, are connected by a cable to each other, and the car in front is connected by a cable to the engine as shown in the figure below. The cars start from rest and accelerate to a speed of 1.9 m/s after 1 min. (a) Find the work done by cable 1 on the car in the back. (b) Find the work done by cable 1 on the car in front. (c) Find the work done by cable 2 on the car in front. http://s966.photobucket.com/albums/ae146/acherentia/?action=view¤t=6-p-011.gif 2. Relevant equations W=F*d W=delta KE KE=1/2 m v^2 3. The attempt at a solution FOR A I need to find the speed at which the cable 1 pulls on the car in the back. How? B asks for the work cable 1 does on the car in front and it will be the result for A with "-" in front FOR C I should know the work done on the car in front, which is actually the work done on the car in front, car in the back and cable between them. How do I express this? Thank you!