# Question #126a1

##### 1 Answer

Nov 28, 2015

#### Answer:

You can do it like this:

#### Explanation:

Hooke's Law tells us that force

For a spring the work done in stretching it will be converted to stored elastic potential energy.

Work done = force x distance moved in the direction of the force.

With a spring we cannot use this directly since the force is constantly changing.

We need to use a bit of calculus:

This gives us the stored elastic potential energy.