The only force acting on an object moving along the x-axis is the conservative force given by f(x) = (2.00 n/m)x + (1.00 n/m3)x3. (a) what is the change in potential energy when the object moves from x = 1.00 m to x = 2.00 m? (b) what is the change in kinetic energy when the object moves from x = 1.00 m to x = 2.00 m?