In 1418, architect Filippo Brunelleschi faced an impossible problem: lifting 70-ton sandstone beams to the top of Florence’s unfinished cathedral dome. No existing crane could reach that height or lift that weight.
in his book. He remembered his teacher, Mr. Henderson, shouting, "Friction is the tax you pay to the universe!" Section 14
While specific PDFs vary by textbook (such as Pearson or Glencoe), most Section 14.3 worksheets ask variations of the following: For a lever: IMA = Distance from fulcrum
Sam did the math quickly. "Okay, the Ideal Mechanical Advantage (IMA) from the book is 4. That assumes no friction. But your actual pull was 300N to lift 600N. So the Actual Mechanical Advantage (AMA) is Output Force divided by Input Force... 600 divided by 300. That’s 2." in his book