Attached is a simple motion analysis I have created. All seems to work fine, however I am trying to plot the velocity of a point or edge of the box along the top surface of the ramp. I can't see an option for this is motion analysis. I have tries the Trace Path option, however this doesn't seem to work (I get the error "Select one point and optionally one reference part to create result" but I can't select anything but a single face).

Could someone please have a go at plotting this for me? I am looking to plot the velocity of the top left edge of the box relative to the upper ramp surface, then another for the lower incline.