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The input force of 11 N acting on the effort arm of a lever moves 0.4 m, which lifts a 40 N weight resting on the resistance arm a distance of 0.1 m.What is the efficiency of the machine

Respuesta :

ANSWER:

90.9%

STEP-BY-STEP EXPLANATION:

Given:

Input force = 11 N

Distance 1 = 0.4 m

Weight = 40 N

Distance 2 = 0.1 m

We calculate the work in each case to then calculate the efficiency of the machine, just like this:

[tex]\begin{gathered} W_1=11\cdot0.4=4.4\text{ J} \\ W_2=40\cdot0.1=4\text{ J} \\ \text{ Therefore:} \\ e=\frac{W_2}{W_1}\cdot100 \\ e=\frac{4}{4.4}\cdot100 \\ e=90.9\% \end{gathered}[/tex]

The efficiency of the machine is 90.9%