# If the length of a #17 cm# spring increases to #61 cm# when a #4 kg# weight is hanging from it, what is the spring's constant?

##### 1 Answer

Apr 1, 2018

See Below.

#### Explanation:

We know,

The **linear expansion** of a elastic body is **directly proportional** to the **force exerted** on it.

So,

So,

Now, Subsititute The Values in the relation.

Hence Explained.