Physics of a spring: Relationship between potential energy and work
Question: A spring is stretched after 4.0-kg object is hung on it vertically. The displacement is measured as 0.020 m. […]
Tag: mechanics
If opposite charges are supposed to attract each other, why don’t electrons fall into the nucleus?
I found this question in Quora.com, and it was asked by an eighth grader. I don’t know how that student […]