Beakman explains how levers make work easier by lifting a large rock that landed on a see-saw. He then explains the 3 different classes of levers and gives examples and shows what makes each one a different lever.
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.
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.