What is the Speed of the Cart Launched by a Spring?

[Walid11]

Homework Statement

125N of force are required to compress a spring by 1.04m. The spring is now used to launch a 1.49 kg cart across a flat horizontal table. What is the speed of the cart?

Homework Equations

The Attempt at a Solution

 

[tiny-tim]

Welcome to PF!

Hi Walid11! Welcome to PF!

you need to use work done and the work-energy theorem …

Show us how far you get, and where you're stuck, and then we'll know how to help!