im having troubles with this one pls can you do a video about it

The lesson before this exercise towards the end, explains the exercise.

To make it a little easier you only need to use two balls.

As Wayne said, can you give a little more info on what it is your having trouble with.

im having trouble getting the correct spacing

From 19-23

Hey ttobe2008 , each of the dots on the motion path is a frame, if you want more space between frames, (faster motion), you can move the keyframes over in the timeline, which will give larger (or smaller) spacing. To adjust the spacing to get progressively larger or smaller between keyframes, you need to rotate the curve handles in the graph editor.

When ever you make a change, remember to click 'update paths' in the properties panel under motion paths.

when I rotate the handles I don't seem to get what I need to achieve

when the ball makes contact with the slope I want it to bounce then roll. When the ball hits the floor I want I to go up immediately but it doesn't seem to work even when I rotate the handles