The bold text has a question. The normal text doesn't so I'll answer the bold question.
force x distance = work. Doing work can increase the system, energy.
I love a bargain as much as anyone and I used to love all the cheap stuff I could find on eBay, but nowadays it seems so hard to find anything cheap over there and just when we're all finding it tougher to just pay our bills. I don't give up so I was looking for someplace online where I could still find myself a bargain... and by accident I came across this site I never heard of before where you get rock bottom prices from police impounded stuff, I mean I was worried about scams but this stuff is actually real and I got some real cheap stuff there... it's become my new eBay lol! Go to WinItems.com