3. A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever?

Question

3.	A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever? 
What is the ideal mechanical advantage of the lever? What is the efficiency of the lever? Show your work.

Ryoko A. Crane · Accepted Answer

MA= Fr/Fe = 62/20 = 3 IMA = 1 / 0.25 = 4 Efficiency= 3/4 = 0.75 x 100 = 75%