Aplot of potential energy versus position is shown for a 0.16 kg particle that can move along an x-axis as it is acted upon by a conservative force. in the graph, ua = 9 j, uc = 22 j and ud = 29 j (corresponding to x> 8). the particle is released at the point where the potential energy u forms a curved "hill." at this point ub = 13 j and the particle has kinetic energy of 10 j. what is the difference in particle speed when it is located at x= 6.5m compared to x=3.5m, and what is the range of possible particle motion?