From the course: Animation Foundations: Fundamentals
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Friction and drag
In the real world, nothing moves perfectly. Some objects will resist motion more than others. The resistance of an object to motion is called friction. A simple example would be a car making a turn. If however, the road is covered in ice, the car will slide. This is because ice is slippery, meaning it has low friction. Pavement on the other hand has a higher coefficient of friction. So just as we saw with mass, the way an object moves, informs us about the object. In this case, the audience learns about the object surface, because of how it moves. Another example would be an inclined plane and a box. If the box has no friction against the plane, it moves smoothly. If the surfaces have more friction, the box moves differently. You can also combine these two to make a surface that appears slippery at the top but not at the bottom. Friction does not only happen between sliding surfaces. There are many other forms of it. One of the most common is air resistance where an object's motion is…
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