Kinetic energy is the energy an object possesses due to its motion. Potential energy is the energy stored in an object based on its position or state, such as gravitational potential energy or elastic potential energy. Spring energy is a type of potential energy stored in a compressed or stretched spring, which can be released to do work when the spring returns to its original shape. **

Hooke's Law states that the force needed to extend or compress a spring by a certain distance is directly proportional to that distance. This means that the spring energy stored in a spring is equal to the work done to compress or extend it. The formula for spring energy is 1/2 * k * x^2, where k is the spring constant and x is the displacement from the equilibrium position. **

The spring hardness of the spring is a measure of how resistant the spring is to deformation when a force is applied. It indicates the stiffness of the spring and is typically measured in units of force per unit of deflection, such as pounds per inch or newtons per millimeter. A higher spring hardness means that the spring requires more force to compress or stretch, while a lower spring hardness indicates a softer spring that deforms more easily. **

We can say that a stretched spring has energy because it has the potential to do work. When a spring is stretched, it stores potential energy in the form of elastic potential energy. This potential energy is stored in the spring due to the deformation of its shape, and it can be released to do work when the spring returns to its original shape. Therefore, the stretched spring possesses energy in the form of potential energy. **

The spring constant, also known as the force constant, is a measure of how stiff a spring is. It is denoted by the symbol 'k' and represents the amount of force required to stretch or compress a spring by a certain distance. The spring stiffness is a measure of how resistant a spring is to deformation and is directly related to the spring constant. A higher spring constant or stiffness indicates a stiffer spring that requires more force to deform. **

A box spring bed with a Bonell spring core can be a good option for those looking for a traditional and affordable mattress support system. The Bonell springs provide a firm and supportive feel, which can be beneficial for those who prefer a more traditional mattress experience. However, it's important to consider your individual preferences and needs when choosing a mattress, as some people may find Bonell springs to be too firm or lacking in motion isolation. It's always a good idea to test out the mattress in person before making a decision. **

To learn Spring Boot and the Spring Framework, you can start by going through the official documentation available on the Spring website. Additionally, there are numerous online tutorials, courses, and books that can help you understand the concepts and best practices of these frameworks. Hands-on practice by building small projects or applications using Spring Boot can also enhance your learning experience. Joining online communities or forums dedicated to Spring development can provide you with support and guidance from experienced developers. **

The question seems to be incomplete. It is asking about a spring with a spring constant of 100 N/m, but it is not clear what the question is asking for. It could be asking about the displacement of the spring, the force applied to the spring, or the period of oscillation of the spring. Without more context, it is difficult to provide a specific answer. **