1. The problem statement, all variables and given/known data A 5.5e4kg space probe is traveling at a speed of 10000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 5.0e5N over a distance of 2500 km. What is the final speed of the probe? 2. Relevant equations velocity=10000 Force= 5e5 displacement=2500 3. The attempt at a solution I just know the kinematics equations. BUt I have no idea how to start.