New member here...(adsbygoogle = window.adsbygoogle || []).push({});

I have the following homework problem:

"A 200-g mass attached to the end of a spring causes it to stretch 5.0 cm. If another 200-gmass is added to the spring, the potential energy of the spring will be"

I know the answer is 4 times as much but I am not quite sure how the answer is being reached.

I thought I could use the forumla:

U= 1/2 kx^2

But I am wrong.

Any help would be much appreciated!

Thank you!!!

A.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Potential Energy of a Spring

**Physics Forums | Science Articles, Homework Help, Discussion**