Calculate Force Needed to Stretch Spring 48cm: 270 N/m

[ross moldvoer]

Homework Statement

What force is necessary to stretch a spring 48 cm, if the spring constant is 270 N/m?

Homework Equations

1/2kx^2

The Attempt at a Solution

tried plugging everything into equation and got 31 but it is wrong. Any help would be greatly appreciated

 

[gneill]

What units came out of your attempt to plug in value to that equation? Did you check to see that they matched what you're looking for?

Look for a more relevant Relevant equation. Hint: Hooke's Law.

 

[Brian T]

The quantity you're looking for is force. The quantity your equation gives you is?