5. Right click on the layer where your sphere resides and select "Add Motion guide", you can access it also through Insert / Timeline / Motion guide.
You'll notice that we now have a new layer called"Guide: name of the layer below"above the layer where our sphere resides. In our case it is called Guide : sphere
That guide layer is the layer where we are going to draw the path that we want our sphere to follow
6. Select the first frame of the guide layer and select the pen tool
Be sure to select the "Smooth" option for the path in the options panel (fig6)
fig6
Then, with the first frame of the guiding layer selected, draw a nice curve going towards the bottom right of your stage (fig7)
fig7
You will notice that, the sphere autosnap on the beginning of your path.
7. we now need to select the last keyframe of our motion tween (on the layer where the sphere resides) and to move the sphere at the end of the path we just drew (fig8)