Conceptual Questions1.There must me force applied (therefore, work done) in order to cause deformation. Work done will be completely transferred into elastic potential energy. Releasing the oscillator (e.g. spring), it will initially go back to the stable position, while the rest of the potential energy will be used to move the spring to the other side. Due to damping, this energy will be lost and an object will go back to the stable point without any more movement.2.A system must have a certain mass, must be stable/balanced at certain point. Also, there must be a force to move it from that stable point and a force that keeps returning it to that point (restoring force).5.Stiffness of material is represented through a constant k. By formula, k is in a direct relationship with frequency. Therefore, higher stiffness results in higher frequency.7.It depends on the current springs. Lowering its level, it means that the car will be bumping up and down for certain amplitude X that will get closer to the ground than when the car is regular. It means that more impact will be produced on the lower surface of the car. If springs are not good enough to prevent higher impact, then installing new ones should be considered.