Springs are simple devices that are commonly used. It is used in shock absorbers in automobiles, in push-back ballpoint pens, in electrical measuring instruments, etc. The spring possesses a simple property by the virtue of which, when compressed or elongated, it tries to attain its original state. Let us try to understand this.
When a force is applied on a spring it suffers an extension Dl in its length l. It has been observed that
where k is the spring constant of the given spring. Its units are N/m.
