1. The problem statement, all variables and given/known data In the 1950's, an experimental train that had a mass of 2.50 x 10 to the power 4 kg was powered accross level track by a jet engine that produced a thrust of 5.00 x 10 to power 5 N for a distance of 500m. a.) Find the work done by the train Work = (500,000)(500) Work is 250,000,000N b.) Find the change in kinetic energy (1) c.) Find the final kinetic energy of the train if it started from rest (1) d.) Find the final speed of the train is there was no friction (2) 2. Relevant equations Kinetic Energy = 0.5 mv^2 3. The attempt at a solution So I found out the amount of work required easily but now i'm stuck on b, c, and d. Since I can't figure out the velocity I can't really use the formula KE = 0.5 mass x velocity squared. How do I find velocity in this question?