# If the length of a #35 cm# spring increases to #73 cm# when a #3 kg# weight is hanging from it, what is the spring's constant?

##### 1 Answer

Dec 13, 2015

The spring constant will be

#### Explanation:

Given Data:

We've just done this to get it into the **SI units** or **MKS system.**

*Force (F)*

*Spring Constant (k) = ?*

We know:

*Spring Constant (k)*

This is our final answer.

The trick here and most of these types of questions, the answer will be the mass we multiplying in the force.