Max speed of girl on swing

[spaumn]

A girl swings back and forth on a swing with ropes that are 4.00m long. The maximum height she reaches is 2.00m above the ground. At the lowest poing of the swing, she is 0.500m above the ground. What is the girl's maximum speed?

The answer is 5.42m/s, I just need to know how to do the problem.

[Hootenanny]

Welcome to the forums,

Have you met the concepts of conservation of energy?

P.S. Homework questions should be posted in the homework forums

[spaumn]

Whoops, I just got on the fourms like 5 minutes ago, I didnt know there was a seperate HW fourm, I will repost this there.