Are you begining a new FPS and are not sure how fast objects should be going? Here's a quick way to find out:

Go to a blank section of your project in your studio, or make a blank project. Put in your desired FPS, and find a place that is blank for about 10-20 frames. Now using a 144 grid, mark a box on the left side of the frame, completely fill it with a color of some kind; if you don't have a grid on your frame, then just make a 1 by 1 inch square as best you can on the right side. Now move on to the next frame, and fill in the next 1 by 1 grid to the right of it; and keep doing this until the filled 1 by 1 grid is on the right side of the project.

Now, go back to the first frame of the filled 1 by 1 grid. Then just play the animation from there, and you'll see how long it takes for objects to move grid by grid. Hope this helps.