Question

A spring has length $l$ and spring constant $k$ . If spring is divided in two equal parts then spring constant of each part is

• A. $k$
• B. $\frac{k}{2}$
• C. $2\,k$
• D. $4\,k$

Answer 1

Answer: (C)

Spring constant $k=F/l$ If spring is divided into two equal parts, then length $(l)$ will become half. So, the spring constant will become double i.e. will become $2 k$.