Last week I gave you an introduction to forces and examples of what they do. So today I'm going to show you how to draw a free-body diagram based on a given situation. In the photo above, my friends are on an upward incline (a hill.) Therefore, there are three forces acting on them at any given time— mg (weight), normal force, and friction (keeping them on the hill.) To draw this, you would do this:
This shows that my friends are on the hill and are staying there due to three kinds of forces. I didn't know that free-body diagrams would help me to understand how to do my PA homework problems, but they really do! They also work with other objects, like cars, cartoon characters, balls, rocks, boxes, and Nutter Butters.
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