Physics The Work-Energy Theorem and Kinetic Energy?

A 5.00 104 kg space probe is traveling at a speed of 15000 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 5.00 105 N over a distance of 2700 km. What is the final speed of the probe? _______m/s