# A 1.25 kg weight is hung from a vertical spring. The spring stretches by 3.75 cm from its original, unstretched length. How much mass should you hang from the spring so it will stretch by 8.13 cm?

##### 1 Answer

Mar 13, 2018

Remember Hookes law.

2.71Kg

#### Explanation:

Hooke's Law relates Force a spring exerts to an object attached to it as:

where F is the force, k a spring constant, and x the distance it will stretch

So in your case, the spring constant evaluates to:

To get an 8.13cm extension you would need:

2.71Kg