The "***" is my answer
3.Which list correctly orders effort (E), fulcrum (F), and load (L) for each lever class?
A. class 1 = F, L, E (or E, L, F)
class 2 = F, E, L(or L, E, F
class 3 = L, F, E (or E, F, L
B. class 1 = L, F, E (or E, F, L ***
class 2 = F, L, E (or E, L, F
class 3 = L, E, L (or L, E, L
C. class 1 = F, E, L (or L, E, F
class 2 = L, F, E (or E, F, L
class 3 = F, L, E (or E, L, F
D. class 1 = F, E, L (or L, E, F
class 2 = F, L, E (or E, L, F
class 3 = L, F, E (or E, F, L
They're wrong, the answer's A
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To determine the correct order of effort (E), fulcrum (F), and load (L) for each lever class, we can refer to the definition and characteristics of each lever class.
Class 1 Lever: In a class 1 lever, the fulcrum is located between the effort and the load. This means that the order is F, E, L (fulcrum, effort, load) or E, F, L (effort, fulcrum, load).
Class 2 Lever: In a class 2 lever, the load is located between the fulcrum and the effort. So, the correct order is F, L, E (fulcrum, load, effort) or L, F, E (load, fulcrum, effort).
Class 3 Lever: In a class 3 lever, the effort is applied between the fulcrum and the load. Therefore, the correct order is L, F, E (load, fulcrum, effort) or E, F, L (effort, fulcrum, load).
Now, looking at the given options:
A. class 1 = F, L, E (or E, L, F)
class 2 = F, E, L (or L, E, F)
class 3 = L, F, E (or E, F, L)
B. class 1 = L, F, E (or E, F, L ***) - This option correctly orders the lever class 1 as load, fulcrum, effort.
C. class 1 = F, E, L (or L, E, F)
class 2 = L, F, E (or E, F, L)
class 3 = F, L, E (or E, L, F)
D. class 1 = F, E, L (or L, E, F)
class 2 = F, L, E (or E, L, F)
class 3 = L, F, E (or E, F, L)
Based on the analysis, Option B correctly orders the effort (E), fulcrum (F), and load (L) for each lever class.