I've recently been looking at the friction caused by a computer mouse sliding on a mousepad. I was wondering, if I increased the size (area) of the mousefeet (points of contact of the mouse with the mousepad) will I get an increase in static and/or dynamic friction? Also, will increasing the weight of the mouse increase static and/or dynamic friction? Furthermore, let's take a mousepad with a cloth surface with a foam layer underneath where the mouse slightly sinks in if there is enough perpendicular force acting on it. If I have two mousepads with exactly the same surface but one with a foam layer thicker than the other, how will they compare in terms of static and dynamic friction? (might be wise to consider there will be a hard material under the foam layer) Thanks in advance!