A particle of mass 2.5 kg moves in a conservative force field. Its potential energy curve is shown below. From the curve, determine (a) the total
mechanical energy of the particle at x = 1.3 m if it has a speed of 8 ms −1 and (b) the minimum total energy at which the particle can escape from the force field. If Etot = 150 J, where would the particle have (i) zero velocity, (ii) maximum velocity?