How Everyday Mechanisms Work
Discover the hidden mechanical tricks inside everyday tools and machines. Learn how levers, gears, linkages, and springs trade effort for distance to make heavy work effortless.
Like Duolingo, but for How Everyday Mechanisms Work. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
A short one: 11 levels across 2 sections, about 22 minutes end to end, roughly 4 days at five minutes a day. It moves through Gaining Mechanical Advantage and Routing and Storing Movement. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in How Everyday Mechanisms Work
- Mechanical tools cannot create free work; reducing required force always increases the required travel distance
- Cutting effort in half requires moving twice as far to do the same job
- Placing the load closer to the pivot point gives you a larger mechanical advantage
- A long handle distance paired with a short jaw distance multiplies hand squeeze into huge biting force
- Placing wire at the outer tips of the jaws makes it hardest to cut
- Gentler slopes trade longer travel distance for less pushing effort
- A screw thread is an inclined plane wrapped spirally around a central shaft
- More threads per inch mean smaller climbing steps and massive clamping pressure at the cost of many turns
- Each strand supporting a movable pulley carries an equal fraction of the total weight
- With four supporting strands, the required pulling force is divided by four (100 pounds)
- The trade-off requires pulling four feet of rope for every one foot the engine lifts
- A small gear turning a larger gear multiplies twisting force (torque)
- Gaining twisting force requires trading away rotational speed
- The larger gear turns slower than the smaller driving gear but pushes much harder
- Every time two gears mesh, the rotation direction flips
- An odd number of meshed gears preserves original direction, while an even number reverses it
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives How Everyday Mechanisms Work the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
If a tool lets you lift a heavy box with half as much effort, what is the trade-off?
Get it right to open this lesson and 10 more in the app.
Where How Everyday Mechanisms Work takes you
- 1
Gaining Mechanical Advantage
- The Core Trade-Off: Trading Distance for Effort
- Interlocking Power: Gears and Drives
- 2
Routing and Storing Movement
- Transforming Motion: Cams, Cranks, and Linkages
- Trapping and Releasing Energy: Springs, Latches, and Ratchets
2 sections · 4 units · 11 levels. Built to play, not to enroll.
You pick the voice
How Everyday Mechanisms Work is taught in the Explain Like I'm 5 style: no big words. promise.. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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