An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 4.8 × 104 kilogram, and the force causes its speed to change from 7800 to 5900 m/s.
(a) Calculate the work done by the force?
(b) If the asteroid slows down over a distance of 1.7 × 106 meter, find the magnitude of the force.