The lever arrangement with the fulcrum between the effort and load is which class?

• A. Class 1
• B. Class 2
• C. Class 3
• D. None

Answer: (A)

When the fulcrum sits between where you apply the force and the load you’re trying to move, you’re looking at a Class I lever. This setup lets the lever change the direction of your push and also gives you a mechanical advantage that depends on how far the effort and the load are from the fulcrum. If the effort arm is longer than the load arm, you can lift a heavier load with less input force; if the arms are equal, the force you apply and the load are the same. Classic examples include a seesaw or a crowbar used to lift a load. The other lever types place the load between the fulcrum and the effort (Class II) or place the effort between the fulcrum and the load (Class III), which describe different arrangements.