If a lever lifts a 150 N load with a measured effort of 60 N and has an IMA of 3, what is the AMA?

To find the Actual Mechanical Advantage (AMA) of a lever, we use the formula:

[

AMA = \frac{\text{Load}}{\text{Effort}}

]

In this scenario, the load being lifted is 150 N and the effort applied is 60 N. Plugging these values into the formula gives:

[

AMA = \frac{150 , \text{N}}{60 , \text{N}} = 2.5

]

This calculation shows that for every unit of effort applied, the lever is able to lift 2.5 units of load. This indicates that the lever is functioning efficiently in distributing the applied force, and this value directly reflects the lever's performance compared to the ideal mechanical advantage (IMA), which describes how much the lever could ideally multiply the input effort without accounting for losses due to friction or other inefficiencies.

The other options, while they present plausible calculations based on different interpretations or assumptions about how mechanical advantage might be defined, do not align with the straightforward application of the AMA formula given the load and effort in this situation. This confirms that the correct answer is indeed 2.5.