Part A (Figure 1) depicts the potential energy of a 310-kg pallet that slides from rest down a frictionless roller conveyer ramp, then moves across a frictionless horizontal conveyer, and finally encounters a horizontal spring at a = 4.0 m. What is the force constant of the spring? When the pallet encounters the spring, it momentarily comes to rest at x = 6.0 m. Express your answer to two significant figures and include appropriate units. O E ? Value Units Submit Request Answer Figure V 1 of 1 4 Part B 3000 Gravitational 2500 Spring At what height h above the horizontal conveyer did the pallet begin sliding from rest? potential potential Express your answer to two significant figures and include appropriate units. energy energy 2000 Potential energy (J) 1500 Value Units 1000 500 Submit Request Answer M + in O Provide Feedback Position, x (m) Next >