Given below is the plot of a potential energy function U(x) for a system, in which a particle is in one dimensional motion, while a conservative force F(x) acts on it. Suppose that Emech = 8 J, the incorrect statement for this system is :
(1) at x > x4, K.E. is constant throughout the region.
(2) at x < x1, K.E. is smallest and the particle is moving at the slowest speed.
(3) at x = x2, K.E. is greatest and the particle is moving at the fastest speed.
(4) at x = x3, K.E. = 4 J.
