There are forces at work whenever you throw a ball, run up the stairs, or push your big brother off the couch. They affect things as small as a toy car and as big as the earth! But what is force, and how does it work

This Stage 2 book explains one of the most fundamental concepts of physics in simple terms and will make a great companion to other physics titles in the series, especially Kimberly Brubaker Bradley and Paul Meisel's previous collaboration, Energy Makes Things Happen.