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 16867 views around the world You can reuse this answer Creative Commons License