An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has amass of 5.7×104 kg, and the force causes itsspeed to change from 7400 to 5900 m/s. (a) What is the work done by the force? (b) If the asteroidslows down over a distance of 1.4×106 m determine the magnitude of the force.