Hi all! I tried searching the answer over the internet but with no luck - how does a child spring toy car works? the ones that you draw backwards and then release. I know that it works with a spring but im interested in more exact details like how to spring draw back turns to circular motion. Also while im at it, what would be a good way to release energy stored in a spring through a determined amount of time? meaning, i can draw back the spring and release just like that but all the energy will be released right away in a short period of time. How can i extend that period of time using only mechanical components? thanks ! p.s This is NOT a homework question. Its for a little project of my own that im thinking of doing.