Answer:
option A
Explanation:
The ratio of the output of the work to the ratio of the total work input is equal to Efficiency.
Fulcrum is the pivot point from which the liver turns.
In the absence of Fulcrum the Center of gravity act as a pivot point of an object which is resting on the horizontal plane.
Whereas the ratio of output force to the input of a simple machine is equal to mechanical advantage.
The correct answer is option A
Mechanical Advantage is the ratio of output to the input applied to a machine.
What is Machine?
A machine is a device that Simplifies work by amplifying the work output when a small input force is applied.
Types of machine
Learn more about Machine here:
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