Newton's second law is tested correctly

Newton's law is considered the pillar of classical physics. When the introduction of new theories such as Theory of Relativity and Quantum Theory, many people still doubt the correctness of Newtonian mechanics.

In fact, the correctness of Newton's mechanics has been tested for a long time, and recent experiments have been conducted to verify these laws, and the results still confirm that Newtonian mechanics is still right in the limits of classical mechanics. The recent results published in Physical Review Letters No. 98 , page 150801 have once again confirmed the correctness of Newton's 2 law with extremely high accuracy.

2 Newton's Law is a pillar of classical physics, which is expressed through force expressions acting on an object that is proportional to the acceleration, and has been tested in an extremely accurate way to a level of 5.10-14 m / s ² . This experiment was improved with thousands of times the accuracy of previous best results, conducted in 1986 ( published in Phys. Rev. D 34 (1986) 3240 ).

The new experiment was carried out by physicists at the University of Washington using a twirling pendulum, a very special kind of pendulum in which recovery force is not gravity (such as pendulum oscillation. single, recovery force is gravity) but is produced by the torque from the twisted strands.

The linear dependence of acceleration on the applied force is measured with extremely high precision. (Photo: Vatlyvietnam)

A notable point of Newton's law is that the frequency of vibration of a snake may depend both on the rotation amplitude (which depends on when the oscillation has a small enough amplitude). To eliminate this, the researchers made the pendulum vibrate at a very small amplitude, and the observed rotation was kept so small that the pendulum's Brown stimulus became significant in the results obtained. OK.

The results of this study on the one hand confirm the accuracy of Newton's second law, but at the same time these analysis techniques can create many advantages for application in aerospace and astronomy.

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