In the case of a can opener, the resistance force is the force required to cut through the metal of the can, while the effort force is the force applied by the user to turn the can opener. The fulcrum is the point around which the can opener pivots, allowing it to cut through the can.

The resistance force is typically much greater than the effort force, due to the mechanical advantage provided by the can opener's design. This allows the user to easily cut through the can with a relatively small amount of effort.

The fulcrum of a can opener is typically located near the center of the can, where the cutting wheel makes contact with the metal. This placement allows the can opener to apply a consistent force to the can, ensuring a smooth and even cut.