Sophie illustrates the six basic simple machines that exist and explains how they are useful in our everyday lives. She defines force and work and mentions that simple machines reduce the amount of work required for a task.
Beakman defines machines and acts like Archimedes to explain why a screw is a machine. He illustrates how he used a screw mechanism to remove water from a container to reduce the amount of work required to complete the task. Beakman then explains more about mechanical advantage and simple machines like the inclined plane.
Bill climbs down a firepole and wants to get back up. He uses simple machines such as ramps and levers to spread out the work and make it easier to get back up. Also, Bill explains that we use ramps every day in the form of stairways.
Sheldon and Leonard use the stairs as an inclined plane to decrease the force required to lift the package. This is a very clear illustration of what an inclined plane is and how it is used in our daily lives.