What powers physicsclassroom.com?
Last seen Jun 2026 · 49 technologies across 19 categories
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Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| kinematic eq | #1 | 41,000 |
| kinematic formulas | #1 | 30,800 |
| newton's third law | #1 | 16,900 |
| potential energy | #2 | 9,800 |
| newton's 3rd law of motion | #2 | 9,000 |
| universal gravitation | #1 | 8,200 |
| coulomb's law | #2 | 8,000 |
| physics | #5 | 7,700 |
| third law of motion | #3 | 7,200 |
| third law of motion | #3 | 7,200 |
| speed of sound | #3 | 7,200 |
| newton's second law of motion | #1 | 5,500 |
| inertia | #5 | 5,200 |
| newton's law of universal gravitation | #2 | 4,400 |
| mechanical energy | #2 | 4,400 |
| potential energy energy | #2 | 4,000 |
| velocity vs speed | #1 | 3,700 |
| speed versus velocity | #1 | 3,700 |
| free body diagram | #2 | 3,600 |
| free body diagram | #2 | 3,600 |
| kinematic eq | #7 | 3,500 |
| what is newton's second law | #1 | 3,400 |
| speed and velocity | #1 | 2,800 |
| newton's 3rd law | #2 | 2,700 |
| what is ke | #4 | 2,700 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 80% desktop
- 18% phone
- 2% tablet
United States
Canada
Australia
Philippines
Pakistan
Malaysia
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
7.02 / 10 · ranked #41,181 of all domains
1,051 referring domains · OpenPageRank
Search traffic
539,600 est. monthly organic visits (US)
55,740 keywords in Google's top 30
Core Web Vitals
| LCP | 1.8 s |
| INP | 75 ms |
| CLS | 0.45 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 2.0 MB · 428 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.physicsclassroom.com | 39 |
| direct.physicsclassroom.com | 34 |
| staging.physicsclassroom.com | 19 |
Full technology history →
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Recent changes
- detected Amazon S3 Jun 2026
- detected Cloudflare Bot Management Jun 2026
- detected comScore Jun 2026
- dropped core-js Jun 2026
- detected GumGum Jun 2026
- detected Mautic Jun 2026
- dropped 33Across May 2026
- dropped Amazon Advertising May 2026
- dropped Cloudflare Bot Management May 2026
- detected Criteo May 2026
- detected MathJax May 2026
- detected Amazon ALB Apr 2026
- detected Amazon Web Services Apr 2026
- detected Mediavine Apr 2026
- detected Wurfl Apr 2026
- detected Cloudflare Bot Management Mar 2026
- dropped Quantcast Measure Mar 2026
- dropped Font Awesome Jan 2026
- dropped Froala Editor Jan 2026
- dropped Confiant Dec 2025
- dropped GumGum Nov 2025
- dropped Akamai Oct 2025
- dropped Akamai Bot Manager Oct 2025
- dropped Primis Oct 2025
- dropped AddThis Sep 2025
- dropped Cart Functionality Sep 2025
- dropped cdnjs Sep 2025
- dropped Criteo Sep 2025
- dropped DoubleClick Campaign Manager (DCM) Sep 2025
- dropped Funding Choices Sep 2025
- dropped Google Analytics Enhanced eCommerce Sep 2025
- dropped Google Sign-in Sep 2025
- detected GumGum Sep 2025
- dropped Smart Ad Server Sep 2025
- dropped VideoJS Sep 2025
- detected Azure Aug 2025
- detected Azure Front Door Aug 2025
- dropped Cloudflare Bot Management Aug 2025
- detected Font Awesome Aug 2025
- detected Froala Editor Aug 2025
- detected HSTS Aug 2025
- detected Htmx Aug 2025
- detected Open Graph Aug 2025
- detected Primis Aug 2025
- detected Radix UI Aug 2025
- detected shadcn/ui Aug 2025
- detected Tailwind CSS Aug 2025