If air resistance is negligible, then according to the law of conservation of energy, the sum of potential and kinetic energies of a freely falling object: 1. remains constant during the fall 2. decreases during the fall increases 3. during the fall becomes zero 4. during the fall flag this questionwhen a spring is a. the potential energy is at a maximum and kinetic energy is at a maximum. b. the potential energy is a minimum and kinetic energy is at a minimum. c. the potential energy is at a maximum and kinetic energy is at a minimum. d. the potential energy is at a minimum and kinetic energy is at a maximum.