Force and Motion: Law of levers

The video explains the law of levers, which states that the effort force times its arm equals the resistance force times its arm. It explores the three classes of levers: first class, where the fulcrum is between resistance and force; second class, where resistance is between fulcrum and force; and third class, where force is between resistance and fulcrum. The video discusses how each class of levers can either conserve or not conserve effort, using examples like crowbars, nutcrackers, and manual brooms.

What distinguishes the third class of levers from the first and second classes?

Summarize the main points discussed in the video regarding the three classes of levers.