Some good pictures there. I like the first one especially.
I see you are using a Fuji S5500.
The key to showing movement in a motorsport picture is to get a 'panning shot'.
Essentially, this means that you have to prefocus the camera on the spot where you want to take the picture. Then when the car comes into view, track it as it passes, and press the shutter when it reaches the desired spot. To start off with use shutter priority mode, with shutter speeds of around 1/320th or 1/250th. The key is to ensure that you follow through with the movement after you have pressed the shutter.
It takes a bit of practice, but within a few sessions, you will be producing some fantastic shots. For example, I only started taking motorsport pictures a few months ago
Hope this helps
