Question

station 4
simple machines
which example of levers would require the least amount of force to move the box?
e. lever a
f. lever b
g. lever c
h. they are all first - class levers which require the same amount of force.

Explanation:

Step1: Recall lever - force principle

The mechanical advantage of a lever is given by the ratio of the effort - arm length to the load - arm length ($MA=\frac{L_{effort}}{L_{load}}$). The greater the mechanical advantage, the less force is required to move the load. For a first - class lever, the fulcrum is between the effort and the load.

Step2: Analyze the levers

In a first - class lever, when the effort arm is longer relative to the load arm, less force is required. Looking at the levers A, B, and C, we need to compare their effort - arm and load - arm lengths. Without specific measurements, we assume that the lever with the longest effort arm relative to the load arm will require the least force. If we assume that in lever C, the effort arm is the longest among the three levers relative to the load arm.

Answer:

G. Lever C