• Place the double-ended cone at the lowest point on incline rails and release it.
• It goes up, makes a few oscillations, and finally rests at the highest point of the rails.
• Does it defy the law of gravity?
• A free body always seeks a position when its center of gravity goes down. Actually, the center of gravity of the double-ended cone, which is its rotational axis, assumed the lowest position at the uppermost point on the rails.