Friction
Friction is a force that acts to prevent the movement of two touching objects. There are two kinds of friction; static and kinetic.
Kinetic friction is when the frictional force is not strong enough to stop the touching objects moving. An example of this is sandpaper against wood.
Static friction is when the frictional force is strong enough to stop touching objects moving. An example of this is a person climbing a pole.
Imagine you are rubbing your hands together quickly. What does it create? Heat and sound. That's the result of the friction.
Some examples of sliding friction include sliding down a playground slide, jeans on your legs while putting them on, and the bottom of the chair leg and floor when moving the chair.
Below is a diagram of an example of friction that I created on Google Drawings.
Another great blog post. I particularly like that you used your own diagram.
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