How do you calculate the mechanical advantage of a second-class lever? Physics Work and Energy Simple Machines 1 Answer ali ergin Feb 9, 2016 E/L=b/a Explanation: "Effort-load-fulcrum" "a: distance between effort and fulcrum" "b:distance between load and fulcrum" "E:Effort" "L:Load" E*a=L*b E/L=b/a Answer link Related questions What is a lever? What is a pulley? How do a wheel and axle work? Why are simple machines not 100% efficient? Why is a fork a wedge? Why is a knife a wedge? Why is a ladder an inclined plane? Why is a zipper a simple machine? Why were simple machines invented? Question #8e654 See all questions in Simple Machines Impact of this question 17262 views around the world You can reuse this answer Creative Commons License