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 4.6× 104 kg, and the force causes its speed to change from 7000 to 5800m/s. (a) What is the work done by the force? (b) If the asteroid slows down over a distance of 1.7× 106 m, determine the magnitude of the force.

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