Physics 150 words

Please answer the following problems in the attached document.

11.2  

11.3

11.6

11.9 

This the book we used for this class : 

1. Physical Biology of the cell
Authors: Phillips, Kondev, Theriot, Garcia

2. Mechanics of the cell
Author: David Boal 

Please show all steps and all formula you use.

• attachment
  hw_2.pdf