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Related Experiment Videos

Laboratory test of Newton's second law for small accelerations.

J H Gundlach1, S Schlamminger, C D Spitzer

  • 1Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA.

Physical Review Letters
|May 16, 2007
PubMed
Summary
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Researchers confirmed Newton's second law holds true for extremely small forces and accelerations. This finding supports explanations for cosmic mysteries like galactic rotation curves and the Pioneer anomaly.

Area of Science:

  • Physics
  • Astrophysics

Background:

  • Newton's second law (F=ma) describes the relationship between force, mass, and acceleration.
  • Astrophysical phenomena like galactic rotation curves and the Pioneer anomaly suggest potential deviations from established physics at low accelerations.

Purpose of the Study:

  • To experimentally verify the proportionality of force and acceleration in Newton's second law.
  • To test the validity of Newton's second law at extremely low acceleration scales.

Main Methods:

  • Conducting experiments to measure force and acceleration.
  • Achieving accelerations significantly lower than those relevant to astrophysical puzzles.

Main Results:

  • Demonstrated good agreement with Newton's second law (F=ma).

Related Experiment Videos

  • Validated the law down to accelerations as low as 5 x 10^-14 m/s^2.

    • Conclusions:

    • Newton's second law remains accurate even at very small forces and accelerations.
    • The findings support the continued applicability of F=ma in explaining astrophysical phenomena.