Useful Links and Videos
http://www.livestrong.com/article/442422-newtons-three-laws-of-motion-for-volleyball/
http://zachsimonvolleyballphysics.weebly.com/top-spin.html
http://www.physicsclassroom.com/class/newtlaws/Lesson-2/The-Meaning-of-Force
http://www2.hesston.edu/Physics/Volleyball/paper.htm
http://www.physicsclassroom.com/class/newtlaws/Lesson-3/Free-Fall-and-Air-Resistance
http://www.real-world-physics-problems.com/physics-of-volleyball.html
http://www.fivb.org/en/volleyball/basic_Rules.asp - Basic Rules
http://www.physicsclassroom.com/class/newtlaws/Lesson-3/Free-Fall-and-Air-Resistance - more about air resistance
http://zachsimonvolleyballphysics.weebly.com/top-spin.html
http://www.physicsclassroom.com/class/newtlaws/Lesson-2/The-Meaning-of-Force
http://www2.hesston.edu/Physics/Volleyball/paper.htm
http://www.physicsclassroom.com/class/newtlaws/Lesson-3/Free-Fall-and-Air-Resistance
http://www.real-world-physics-problems.com/physics-of-volleyball.html
http://www.fivb.org/en/volleyball/basic_Rules.asp - Basic Rules
http://www.physicsclassroom.com/class/newtlaws/Lesson-3/Free-Fall-and-Air-Resistance - more about air resistance