Levers use mechanical advantage to ease lifting; they consist of a bar and a pivot (fulcrum) with effort, fulcrum, and load arranged differently in first, second, and third class levers ...

Class 1 Levers. Class 1 is perhaps the most familiar. Examples of that are a seesaw, a crowbar as well as any time you’ve picked up a stick and placed it on a handy pivot point to lift something ...

Background Seesaws and scissors belong to a certain class of levers, called class 1. Class 1 levers usually have a beam that is rigid, long and thin, like a ruler.

When we think of machines, the likes of robots, appliances and manufacturing equipment come to mind, but scientists also classify such common objects as the screw, the lever, the wedge and the ...

Design a working model of a trebuchet and demonstrate the power of a Class 1 lever. Secrets of Stonehenge. New archeological finds shed light on the most misunderstood monument of the ancient world.

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A class 1 lever has the Fulcrum in the middle. E.g., Using a crowbar. Figure caption, A class 1 lever - showing the fulcrum in the middle. Class 2 lever.