42. In a one dimensional problem, an object of mass m = 2.0 kg is under effect of a resultant force Fxas shown in Fig. 7. If the object passes through the origin (x = 0.0 m) with initial velocity v0 = -2.0 m/s at t = 0, what is the velocity at t = 4.0 s? (A) -2.0 m/s (B) -3.0 m/s (C) -5.0 m/s (D) -8.0 m/s (E) -16.0 m/s