Physics
The graph shows load against effort for a lever with load and effort on the same side of the fulcrum.
(a) Which feature of the load and effort graph must be calculated to determine mechanical advantage?
(b) Which class does this lever belong to?
Answer
(a) Slope
(b) 2nd class
Explanation:
(a) The slope of the load-effort graph is the key to finding mechanical advantage.
(b) 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 MA = 2.
Since MA > 1, meaning effort arm > load arm. This is characteristic of a class II lever, where the load lies between the fulcrum and the effort.
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