A face.
If you mean 1 flat surface and 1 vertex, then the only thing I can think of is a cone.
Cone
The only thing I can think of is a cone.
A sphere.
Only if you push it. On a perfectly flat surface, in neutral it will not roll without assistance.
yes
So it doesn't roll off when you place it on a flat surface.
A cone. If your definition of rolling includes the motion of a cone down an incline.
A face.
A smooth and flat surface with minimal friction, such as a polished marble floor, will allow a ball to roll the fastest. The lack of friction will reduce resistance and enable the ball to maintain its speed for longer distances.
A cone fits the description.
Cylinder
Cylinder
If you mean 1 flat surface and 1 vertex, then the only thing I can think of is a cone.
Mathematically, a cone is infinite and so has no flat surface. The popular cone is actually a truncated cone and does have 1 flat surface.
'cheese balls'