Levers Explained Class 1, 2 & 3 Mechanical Advantage, IMA, AMA & Efficiency

How can a small force move a much larger load? The answer is the lever, one of the six simple machines. In this video, we explore how levers work and why changing the position of the fulcrum, effort force, and resistance force can completely change the behavior of a machine. You’ll learn: What a lever and fulcrum are The difference between Class 1, Class 2, and Class 3 levers Real-world examples of each lever class How effort distance \(D_E\) and resistance distance \(D_R\) determine Ideal Mechanical Advantage (IMA) How effort force \(F_E\) and resistance force \(F_R\) determine Actual Mechanical Advantage (AMA) How to calculate efficiency (EFF) Why a mechanical advantage less than 1 can actually be useful How Class 3 levers such as tweezers can trade force for precision and control Why a longer lever can make moving a heavy resistance much easier The engineering idea behind Archimedes’ famous statement about moving the world with a lever This lesson connects physics, engineering, simple machines, forces, torque, mechanical advantage, and real-world mechanisms through clear visual examples. Perfect for Physics, Principles of Engineering, STEM, Engineering, and Simple Machines lessons. 🌐 More STEM videos and educational resources: stemeducation.tech #Levers #SimpleMachines #MechanicalAdvantage #Physics #Engineering #STEM #IMA #AMA #PhysicsEducation #EngineeringEducation