Here are the lecture slides I used today. let me know if you have any question.

And the following photo is for the discussion in next week’s tutorial. Jean will give you the background information in class.

Courtesy: Mr. Stanley Forman’s official website

In the tutorial we will discuss the “fire escape collapse” photos taken by Stanley Forman (above). Please take a look at the series of photos on Forman’s website before you come to the class.