A Force Acting on a 2

A force acting on a 2.00 kg object is given by F(x) = (2.00 N/m) x + (1.00 N/m³) x³. An object starts at rest at x = 1.00 m. What is speed of the object when it reaches x = 2.00 m?

A) 1.23 m/s
B) 0.650 m/s
C) 2.60 m/s
D) 1.78 m/s
E) The object does not reach 2.00 m because the increase in potential energy would imply a negative kinetic energy.