Mechanisms

Take a look to this lesson about pulleys. The same contents can be applied to gears.

Use pause and play buttons to take some notes about the contents and of course, ask your teacher for explanations if you don't understand the contents.

Pay attention to what it's explained in the video, because your teacher will ask you some questions.

Dynamical structures

Most of structures are static. But others obtain energy to move, as these examples of Theo Jensen's dynamical structures, which takes energy from wind to move. Legs are assembled in a motion structure and looks like insects. But really, it works!!!

This video was uploaded by BBC in 2010 and some others like it are available in http://www.bbc.co.uk/programmes/b00vt1xp





Some others do not use typical hard material and can be made of paper. Take a look to this example....