A horizontal net force FFF is exerted on an object at rest. The object starts at x = 0\,\text mx=0mx, equals, 0, start text, m, end text and has a speed of 4.0\,\dfrac{\text m}{\text s}4.0 s m ​ 4, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction after moving 8.0\,\text m8.0m8, point, 0, start text, m, end text along a horizontal frictionless surface. The net force FFF as a function of the object's position xxx is shown below