Chapter1 Chapter2 Chapter3 Chapter4  + Projectile motion Chapter5 
Chapter6 + chapter6 Chapter7 Chapter8 + extra Chapter9 Chapter10
Chapter11 + figure1 + extra + extra1 + extra2 + extra3

demo1, demo2, demo3

Chapter11a

 Chapter 12

demo

Chapter13 + link

+link1 + link2 + link3

Chapter 13a;

Demo (Kepler's laws)

Demo (Halley Comet)

Demo (Changing orbits)

 Chapter14 + Archimedes

+ Pascal + iceberg + Bernoulli

 Chapter15 + Chapter15