In 1947. Northrop Aircraft developed and built a deceleration sled to test the effects of extreme forces on humans and equipment. In this sled, a test pilot with a mass of 70.0 kg undergoes a sudden negative acceleration of 4.90x 102 m/s. This deceleration occurs over a distance of 8.05 m. How much work is done against the pilot's body during the deceleration?