30 U(x) 25 20 E = U+K energy (J) 15 10 5 -4 -3 -2 -1 1 2 3 x (m) Figure 5.3: A hypothetical potential energy curve for a particle in one dimension. The horizontal red line shows the total mechanical energy under the assumption that the particle starts out at r = -2 m with Ki = 8J. The green line assumes the particle starts instead from rest at r = 1 m.Problem 5: How manyr "units" of convertible kinetic energy did the ball in Figure 5.4 have just before it hit the ground, and how many of these were dissipated in the collision? Select One of the Following: (a) 9, 2 (b) 5. ]_ (c) 5. 2 (d) 9, 1