Física

Deixo aqui neste post alguns links sobre Fisica nomeadamente sobre:

* Vectores

http://www.khanacademy.org/science/physics/mechanics/v/visualizing-vectors-in-2-dimensions

* Leis da gravitação 

http://www.khanacademy.org/science/physics/mechanics/v/introduction-to-gravity

* Leis de Newton

http://www.khanacademy.org/science/physics/mechanics/v/unbalanced-forces-and-motion

http://www.khanacademy.org/science/physics/mechanics/v/newton-s-first-law-of-motion-concepts

http://www.khanacademy.org/science/physics/mechanics/v/newton-s-first-law-of-motion

http://www.khanacademy.org/science/physics/mechanics/v/newton-s-second-law-of-motion

http://www.khanacademy.org/science/physics/mechanics/v/newton-s-third-law-of-motion