(a) x =0 (b) x = t 9 (c) x=t 9 (d)xt 3 u 2. a classical particle has total energy e. the plot of potential energy u as a function of distance r from the centre

(a) x =0 (b) x = t 9 (C) x=t 9 (d)xt 3 U 2. A classical particle has total energy E. The plot of potential energy U as a function of distance r from the centre of force located at r = 0 is shown in the figure. Which of the regions are forbidden for the particle? (b) ll and IV (d) Iand I (a) I and (c) I and IV