Question: what is the difference between 2nd and 3rd class levers?
Answer: In second class levers the load is between the effort (force) and the fulcrum. A common example is a wheelbarrow where the effort moves a large distance to lift a heavy load, with the axle and wheel as the fulcrum. ... With third class levers the effort is between the load and the fulcrum, for example in barbecue tongs.