# Find the spring constant and the amplitude of the simple harmonic moti

1. Nov 21, 2004

### Flinthill84

Having a little trouble with this one:

A 4kg mass is attached to a spring and executes simple harmonic oscillation with a period of 1.50s. The total mechanical engery of the system is 12J. What is the spring constant. Determine the amplite.

I was able to find the amplitude which is 0.585m but am not able to find the spring constant. The formula that I have for spring constant you have to know the angular frequency so I do not think that is right. Can anyone help?

2. Nov 21, 2004

### Andrew Mason

Use the equation of shm: $x = A sin \omega t$ where $\omega = \sqrt{k/m}$