Further reading and references

Finished Chapter 1 and want to go deeper — or stuck somewhere and need a second source? This is our curated list. Each entry has a short note on why it is useful and for whom.

Selection principle: Only freely accessible resources (videos, open textbooks, NIST/BIPM docs) — or standard reference books available in university libraries.

Video lectures

Walter Lewin — MIT 8.01: Classical Mechanics
youtube.com/playlist?list=PLyQSN7X0ro203puVhQsmCj9qhlFQ-As8e
Legendary course. Lect 1 (measurement, dimensional analysis, estimation) and Lect 10 (pendulum + Hooke’s law) map directly to our Chapter 1. Lewin is the master of live demonstrations — including hanging from a pendulum himself, which our pendulum experiment references.

Feynman Lectures — Vol I, Ch 5: Time and Distance
feynmanlectures.caltech.edu/I_05.html
Fermi estimation and dimensional analysis from a master of both. Full text free (Caltech). Chapter 1 (Atoms in Motion) is also useful for seeing physics from the bottom up.

3Blue1Brown — But what is a moment?
youtube.com/watch?v=fBadC_5DdRw
Grant Sanderson’s math-focused animations — good visual introduction to big/small numbers and estimation.

Veritasium — How to Weigh a Kilogram Using the Kibble Balance
youtube.com/watch?v=Oo0jm1PPRuo
Companion to §1.5 — Derek Muller takes a full tour of NIST and the Kibble balance.

Open textbooks

OpenStax University Physics Vol 1
openstax.org/books/university-physics-volume-1
– Chapter 1: Units and Measurement — complete coverage, free, downloadable PDF
– Difficulty similar to Halliday but with more modern and diverse scenarios
– End-of-chapter problems with solutions (via the ScholarLift app)

Halliday, Resnick, Krane — Physics (Volume 1)
The primary reference for this chapter. If you have access, check the Sample Problems and Problems at the end of Chapter 1 — different scenarios exercising the same recipes.

Feynman Lectures on Physics — Vol I
feynmanlectures.caltech.edu/
Volume 1 is free online. For Chapter 1, read: Chapter 1 (Atoms in Motion), Chapter 5 (Time and Distance), Chapter 22 (Algebra).

Metrology (standards and measurement)

NIST — Guide for the Use of the International System of Units (SP 811)
physics.nist.gov/cuu/pdf/sp811.pdf
The official NIST SI guide — with complete conversion tables, notation rules, and the constants list. The final reference for debugging tricky conversions.

BIPM — SI Brochure (9th Edition)
bipm.org/en/publications/si-brochure
The official SI document — precise definitions of the 7 base units (post-2019 redefinition), conversion appendices, and history of each unit. If you’re unsure about any value, this is the ultimate reference.

CODATA — Recommended Values of the Fundamental Physical Constants
physics.nist.gov/cuu/Constants/
Precise values of physical constants — speed of light, Planck’s constant, Avogadro, Boltzmann, … with the latest precision. For any serious calculation, refer to this rather than memorizing.

NIST Standard Reference Database — Physical Constants
nist.gov/pml/fundamental-physical-constants
The official constants table with uncertainties — useful for reporting a final number with correct sig figs.

Interactive / simulations

PhET Interactive Simulations — Estimation
phet.colorado.edu/en/simulations/estimation
Visual practice of length, area, and volume estimation. For sharpening size intuition.

Powers of Ten (classic)
youtube.com/watch?v=0fKBhvDjuy0
Charles and Ray Eames’s classic 1977 short — from 10^24 m down to 10^{-16} m in factor-of-10 steps. The best way to feel astronomical/quantum scales.

Our interactive experiments
– Simple pendulum experiment — measure g Halliday-style with error analysis
– Free-fall experiment — measure g by a different method for cross-check
– Hooke’s law experiment — linear fitting reveals systematic error

All three inject random error in the background and include a “Python analysis” section (in-browser Pyodide).

Review articles (advanced)

Redefining the SI (2019)
bipm.org/en/measurement-units/rev-si/
The 2019 SI redefinition, which moved the kilogram from the IPK to Planck’s constant. A milestone in the history of measurement.

Time and Time-keeping — SP 250-25
nist.gov/pml/time-and-frequency-division
If you want more about cesium atomic clocks (our Chapter 1 appendix), NIST-F1/F2 and the optical clock program are documented here.

A few notes on using these resources

1. Always convert to SI before computing. Even if a book or website works in other units (imperial, cgs), in your own calculations stick to SI.

2. The primary reference is BIPM/NIST, not Wikipedia. For precise constants, always refer to CODATA. Wikipedia probably cites CODATA, but for formal reporting quote the primary source.

3. Use Feynman for intuition, Halliday/OpenStax for recipes, NIST for precise values. Each source has its own style — the best approach is to combine them.

4. In code, use standard libraries. scipy.constants has all CODATA constants. pint in Python, Units.jl in Julia, units in Rust — all handle factor-label conversions and catch unit-mismatch errors for you.

End of Chapter 1

This is the end of Chapter 1 (Measurement). The tools you learned:

• §1.6: scientific notation and SI prefixes — for numbers at any scale
• §1.7: dimensional analysis — for building formulas from first principles and verifying
• §1.8: significant figures — for honest reporting of precision
• §1.9: factor-label conversion — for moving between units and systems
• §1.10: 6 worked problems as a template
• §1.11: 22 exercises for your own practice
• §1.13 (optional): Q&A / FAQ — common questions

Next chapter: Motion Along a Straight Line (1D kinematics) — applying these tools to real mechanics problems.

📚 Feedback: if you know another good resource that’s missing here, let us know so we can add it. This list is continuously updated.