Hi folks,
In class today, we got into a new concept of free body diagrams. Free body diagrams help to analyze the different forces on objects in order to determine the net force and acceleration of those objects.
We also spent a good bit of time learning Newton's 3rd Law and demonstrating how it works with the help of two skateboards.
Homework this week is to read the following web pages
http://www.physicsclassroom.com/class/newtlaws/Lesson-2/Drawing-Free-Body-Diagrams
http://www.physicsclassroom.com/class/newtlaws/Lesson-2/Determining-the-Net-Force
I would highly recommend taking a look at the problems and the solutions on each one of these pages.
Also, do the interactives on this page http://www.physicsclassroom.com/Physics-Interactives/Newtons-Laws/Free-Body-Diagrams/Free-Body-Diagram-Interactive. The page is a little clumsy, but with a bit of patience hopefully you'll get the hang of it. When you get the answer, write down the force body diagram on a separate piece of paper to hand in.
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