What are your favourite classical physics puzzles?

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SUMMARY

This forum discussion centers on classical physics puzzles that engage participants during winter evenings. Notable examples include the gravitational interaction of three point masses and the shape of an asteroid maximizing surface gravity. Participants share their insights on the relationship between angular speed and distance in gravitational systems, as well as the implications of entropy increase in classical statistical mechanics. The conversation highlights the importance of elegant and creative solutions in physics problem-solving.

PREREQUISITES
  • Understanding of classical mechanics, particularly gravitational interactions
  • Familiarity with angular momentum and rotational dynamics
  • Knowledge of statistical mechanics and the concept of entropy
  • Proficiency in mathematical notation, including LaTeX for equation representation
NEXT STEPS
  • Explore gravitational dynamics involving multiple bodies, focusing on angular velocity calculations
  • Study the implications of the H theorem and molecular chaos in statistical mechanics
  • Investigate the relationship between curvature and torsion in rolling motion on curves
  • Examine sailing dynamics in relation to wind and current effects on boat speed
USEFUL FOR

Physics enthusiasts, educators, and students interested in classical mechanics and problem-solving techniques in physics. This discussion is particularly beneficial for those seeking to deepen their understanding of gravitational systems and statistical mechanics.

  • #31
@wrobel I missed the part ##\omega## is parallel to the plane.
 
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  • #32
etotheipi said:
wondered if people would like to share some fun problems that you can snuggle up to on a cold Winter's evening?

There is a sailing race down a river which flows at 10 km/h.

- On the first day the wind relative to the ground blows at 10 km/h parallel to the river in the downstream direction.

- On the second day there is no wind relative to the ground.

During which day can the sailboats make faster progress down the river?
 
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  • #33
I believe the correct answer for @A.T. 's sailing puzzle is the second day.
(I've done a little sailing, and to head into the direction the wind is coming from, you zigzag toward the destination).
 
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