The graph shows load against effort for a lever with load and effort on the same side of the fulcrum.
(a) Which attribute of the load vs effort graph must be calculated to determine the mechanical advantage?
(b) Which class does this lever belong to? How did you arrive at this conclusion?
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(a) The slope of the load-effort graph is the key to finding mechanical advantage.
(b) The lever belong to 2nd class because in a linear load-effort graph that passes through the origin, the slope represents the ratio of Load to Effort. So, we just need to calculate the slope of the line to get the mechanical advantage. Choose any point on the line — for instance, (Effort = 10 kgf, Load = 20 kgf) gives M.A. = 2.
Since M.A. > 1, meaning effort arm > load arm. This is characteristic of a class II lever, where the load lies between the fulcrum and the effort.