Answer
a. Standing on the flat base.
b. Balanced on the sharp tip.
c. Laying on its rounded side.
Work Step by Step
a. Place it flat on its base. If the cone is pushed away from this position and released, it returns to equilibrium.
b. Balance it on its tip. If the cone is pushed away from this position and released, it topples away from equilibrium.
c. Place the cone on its side, as shown in the textbook diagram. If the cone is pushed away from this position and released, it stays at its new equilibrium position.