"Give me a fulcrum, and I can move the whole earth." Who said this famous saying?

Answer: "Give me a fulcrum and I can move the whole earth." This famous saying was said by the great ancient Greek physicist Archimedes.

1. Analysis:

This sentence embodies the principle of leverage, that is, if Archimedes stood outside the earth, there was a rod that was long and hard enough, and there was a fulcrum. , he can move the earth.

Now it is also used to describe success as long as the conditions are met.

2. Archimedes

Archimedes (287 BC - 212 BC), a great ancient Greek philosopher, encyclopedic scientist, mathematician, Physicist, mechanics, founder of static mechanics and fluid statics, and known as the "Father of Mechanics", Archimedes is ranked as the world's three major mathematicians along with Gauss and Newton. Archimedes once said: "Give me a fulcrum and I can lift the entire earth."

Archimedes established the basic principles of statics and hydrostatics. Many methods are given for finding the center of gravity of geometric figures, including the center of gravity of a figure enclosed by a parabola and its parallel chords. Archimedes proved that the buoyant force on an object in a liquid is equal to the weight of the liquid it displaces, a result that became known as Archimedes' principle. He also gave the criteria for the equilibrium stability of a positive parabolic rotating body floating in a liquid. The machines invented by Archimedes include the water spiral for diverting water, the lever and pulley machinery that can move a fully loaded ship, and the Earth-moon-sun movement model that can explain the phenomena of solar and lunar eclipses. However, he believed that mechanical inventions were inferior to pure mathematics, so he did not write any books in this area. Archimedes also used the continuous division method to find the volume of ellipsoids, rotating paraboloids, etc. This method already has the prototype of integral calculation.

3. Leverage Principle

A system that satisfies the following three points is basically a lever: fulcrum, force application point, and force receiving point. The lever principle is also called the "lever balance condition": for a lever to be balanced, the two moments (the product of the force and the moment arm) acting on the lever must be equal in size. That is: power × power arm = resistance × resistance arm, which can be expressed as:

F1 represents power, L1 represents power arm, F2 represents resistance, and L2 represents resistance arm.