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. 5 x 10⁴ kg, and the force causes its speed to change from 7100 to 5500 m/s.
A) What is the work done by the force?
B) If the asteroid slows down over a distance of 1. 8 x 10⁶m, determine the magnitude of the force.