Question

question 32 (1.7 points)
what is the major factor controlling how levers work?
a) the weight of the load
b) the difference in the positioning of the effort, load, and fulcrum
c) the structural characteristics of the muscles of the person using the lever
d) the direction the load is being moved
question 33 (1.7 points) saved

Explanation:

Lever operation is based on the principle of moments. The formula for the principle of moments is \(F_1\times d_1 = F_2\times d_2\), where \(F_1\) is the effort force, \(d_1\) is the effort arm (distance from the effort to the fulcrum), \(F_2\) is the load force, and \(d_2\) is the load arm (distance from the load to the fulcrum). The relative positions of the effort, load, and fulcrum (i.e., the lengths of the effort arm and load arm) determine how much effort is needed to lift a load. For example, in a first - class lever (fulcrum between effort and load), a change in the position of the fulcrum changes the mechanical advantage.

Answer:

B. the difference in the positioning of the effort, load, and fulcrum