A lever is used to raise a 12 kg mass with an effort that is only
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A lever is used to raise a 12 kg mass with an effort that is only 4 kg. What is the mechanical advantage?
A. 12
B. 4
C. 3
D. 2
Please scroll down to see the correct answer and solution guide.
Right Answer is: C
SOLUTION
The ratio of the load moved by a simple machine to the effort applied on it, is called mechanical advantage.
\(MA = \frac{{Load}}{{Effort}} = \frac{{12}}{4} = 3\)
Note: Some other terms used in simple machines are;
\(Velocity\;Ratio = \frac{{Distance\;moved\;by\;effort}}{{Distance\;moved\;by\;load}}\)
\(Efficiency = \frac{{Work\;output}}{{Work\;input}}\)