Potential energy for a spring law

vendredi 19 septembre 2014

Hi guys! Thanks for this great forum. I have a question I need explanation about please...

I just started 11th grade and it's my first time taking springs. In the book, they said :

Ep= 1/2 k x^2

I already understand all the previous laws like [w= -1/2 k (x2^2 _ x1^2)] and know where thay came from

But THIS law is not explained in the book and I didn't get where it came from...

What's x^2 ?? Why 1/2 and not -1/2??

Can u please help me with this??

Thank you :)





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