Lay a pencil on a flat surface. This will serve as the fulcrum for your experiment. 2. Set the center of the ruler on the pencil so that the length of the ruler is perpendicular to the pencil 3. Place stack of 3 pennies onto one end of the ruler. Record the distance from the center of the ruler that these pennies were placed. The distance is from the center of the stack of pennies to the center of the ruler. 4. Predict the distance from the fulcrum that you must place the center of mass of 4, 5, 6, 7 and 8 penny stacks to balance the ruler. You wi