Part a and b

8) An engine can pull a train with a force of 2.95x10* N. It pulls 20 railcars each of mass 2.00*10* kg. The railcars are subject to rolling friction equal to 0.5% of their weight. (a) What is the work done by the engine on the train (not including the engine) when it starts from rest and moves 1.00 km? (b) What is the speed at 1.00 km