Shutter speed can create speed in your images.
Your shutter speed can give the effect of really high speed to your images as well as freeze it for a moment to make it look like something has stopped while you were photographing it.
Here I have played a bit with the shutter speed and documented it so you can see the difference in how much more speed it looks like it is in the photograrphs, even though what you are photographing has more or less the same speed the whole time.
In this case, I have a girl on a swing in a playground here in Västerås, Sweden.
I pushed her at regular intervals so that she would have about the same speed through out, while I was capturing her.
Take a look at what different emotions the pictures give you as a viewer and how different the speed of the girls looks like and the only difference is the speed of the cameras shutter. The slowest shutter speed I had was 1/15 second and the fastest I had was 1/500 second. On the latter I have frozen the moment so it looks like the girl on the swing is completely still and photographed without speed.