Describing a bottle opener and the way it functions.

My question is deceptively simple seeming, all I have to do is describe how a bottle opener opens a bottle.

I think I have a good explanation worked out, but I just want to make sure it all adds up and is well presented.

http://img38.imageshack.us/img38/5733/question2i.jpg

My explanation is this:

The bottle opener uses the top of the bottle as a fulcrum so that when the handle is pulled up, pressure is applied to the cap stressing the metal, forcing it to bend and release the bottle.

Another part to the question is:
Explain why the bottle cap opener does not violate the law of conservation of energy.

My answer is:
When the cap is bent by the opener a small amount of heat is produced.
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Are my answers correct and complete?

Thank you!

You might want to add something about the length of the arms in your first answer.
The second seems absolutely correct to me.

Thanks Pim!

Would this be a good revision?

The bottle opener uses the top of the bottle cap as a fulcrum giving the lever handle leverage.When the handle is pulled up, pressure is applied to the cap stressing the metal, forcing it to bend and release the bottle.

I realize that I over used the word lever...but it can't be helped. (Nerd)

"Fulcrum giving leverage to the handle"

I think that would be better.

Other than that, it looks good!