Here's a breakdown:

* Effort: The force applied to the machine. This is the force you are putting in.

* Resistance: The force that the machine is trying to overcome. This is the force that the machine is working against.

Examples:

* Lever: The effort force is used to lift a heavy object (resistance force).

* Inclined plane: The effort force is used to push an object up the incline, overcoming the force of gravity (resistance force).

* Pulley system: The effort force is used to lift a heavy weight (resistance force).

The mechanical advantage of a machine is the ratio of the resistance force to the effort force. A higher mechanical advantage means the machine is making it easier to overcome the resistance force.