Torque and Center of Mass

Torque:
 http://www.physics.uoguelph.ca/tutorials/torque/Q.torque.intro.html

Center of Mass:
http://dev.physicslab.org/Document.aspx?doctype=3&filename=RotaryMotion_CenterMass.xml

The first website addresses the definition of what torque is and how we measure it. The second website explains in detail the definition of the center of mass, and even gives similar examples that I did in class.
Torque is the measure of how much a force acting on a object causes it to rotate. The equation we learned to find out the torque of something is, torque = force x lever arm (lever arm is the distance from the axis of rotation). For example when you push a door closed you don't have to apply a lot of force due to the fact that you are farther away from the axis of rotation. If you were to push the door closed closer to the hinges, you would have to push with a greater force because the lever arm is smaller.
The center of mass is the point representing the average position of the matter in a body or a system. When a object is perfectly balanced we know its center of mass is over its base, because if it wasn't then the object would tip over. Systematically speaking, when the center of mass is not over the base of an object it creates a lever arm which means a force will cause the object to rotate on it's axis.