1. The problem statement, all variables and given/known data A ruler is attached to the top of a pole bound by its center (pivot point of the ruler is at its center). A student briefly exerts a downward force on the right end of the ruler. The magnitude of the force exerted by the student is less than the weight of the ruler. Assume that pivot point is frictionless. 2. Relevant equations After the student stops pushing the ruler, will it continue spinning or come to a stop? Does the motion of the ruler's center of mass ever change? 3. The attempt at a solution I am assuming the ruler will spin forever if the pivot point is frictionless, but I wasn't sure because the force applied on it was less than its weight. That had me thinking of the possibility that the ruler's motion may change direction and it will be restored to its original position.