We learned how to keep the center balance. I learned to use not a wasteful materials and in the result we still going to build a beatuful bridge. This can help in making bridges because it shows and you learn how to balance the center to make bridge stable. People don't need to die because of the humans mistakes. 

​We were testing what the maximum overhang of the center of mass. Tested it by changing the center, balanced by keeping books stuck. It so hard to balance sometimes, so we must to be very careful, to make sure it didn't touch the floor.

When doing this project, I moved only one book to balance well and carefull. Books actually depend on eachother. 

The center of mass is the point where all the mass mass of the object is concentrated.