Mechanical Engineering: How Machines Work
Discover the physical principles behind the machines you interact with every day. Learn how mechanisms transform motion, why structures hold or break, and how engineers master friction, fluids, and heat.
Like Duolingo, but for Mechanical Engineering: How Machines Work. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
24 levels across 3 sections, about 48 minutes end to end, roughly 10 days at five minutes a day. It moves through Making Things Move and Hold Together; Why Structures Fail and How Materials Resist; and Harnessing Power, Heat, and Fluid Motion. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in Mechanical Engineering: How Machines Work
- Mechanical advantage lets a small effort move a heavy load by spreading the work over a longer stroke or distance
- A mechanism cannot create energy; gaining output force always requires moving a greater input distance
- Gears act like continuous rotating levers meshing at their teeth
- Driving a larger gear from a smaller gear slows down rotation but multiplies torque proportionally
- Four-bar linkages can turn simple continuous spin from a basic motor into oscillating, sweeping back-and-forth motion
- The motion path is determined entirely by the relative lengths and pivot positions of the rigid bars, requiring no software control
- A rotating cam drives a follower directly riding along its shaped edge
- A constant radius holds the follower still (dwell), while changing radii push or let the follower return at chosen rates
- Backlash is intentional clearance that keeps gear teeth from binding or jamming as parts heat up and expand
- Because teeth do not touch on both faces at once, reversing gear direction creates momentary lost motion before the opposite faces engage
- Tightening a bolt stretches it like a stiff spring, clamping the mating surfaces together with high force
- The friction between the clamped plates carries the sideways shear load before the bolt body ever touches the hole walls
- Relying on the bolt shank to physically block sideways movement usually means the joint has already slipped
- A finer thread pitch acts like a gentler ramp, giving greater mechanical leverage to generate clamping tension with less wrench effort
- The shallower angle of fine threads creates a smaller tendency for vibration to push the bolt backward and loosen it
- Coarse threads are faster to spin on and less prone to stripping or cross-threading, but back out more easily under vibration
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 Mechanical Engineering: How Machines 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.
When a tool gives you extra lifting force, what must you give up in return?
Get it right to open this lesson and 23 more in the app.
How to learn Mechanical Engineering: How Machines Work, step by step
Go in order. 24 short levels across 3 sections, about 48 minutes in all, five minutes a day.
- 1
Making Things Move and Hold Together
- Transforming Motion with Levers, Linkages, and Gears
- Holding Assemblies Together Under Load
- 2
Why Structures Fail and How Materials Resist
- Diagnosing Bending, Stress, and Structural Failure
- Matching Materials to Environmental and Mechanical Demands
- Controlling Friction, Wear, and Rotating Shafts
- 3
Harnessing Power, Heat, and Fluid Motion
- Transmitting Force Through Hydraulics and Pneumatics
- Dissipating Heat and Managing Thermal Stress
- Taming Vibrations, Resonance, and Dynamic Balance
3 sections · 8 units · 24 levels. Built to play, not to enroll.
Questions about Mechanical Engineering: How Machines Work
How do I learn Mechanical Engineering: How Machines Work?
Go in order: start with Making Things Move and Hold Together, then Why Structures Fail and How Materials Resist, then Harnessing Power, Heat, and Fluid Motion. On Tomo that's 24 short levels, about 48 minutes in all, played five minutes a day. Start free and play the first level in under a minute.
Is there a Duolingo-style app for Mechanical Engineering: How Machines Work?
Yes. Tomo works like Duolingo: short daily lessons, streaks and quick quizzes. Mechanical Engineering: How Machines Work is one of its free courses, and you can type any other topic to get a course of your own.
Is the Mechanical Engineering: How Machines Work course free?
Yes. Mechanical Engineering: How Machines Work is playable on Tomo's free plan, which doesn't expire. No credit card, no waitlist. Download the app and start your first lesson.
How long does it take to learn Mechanical Engineering: How Machines Work?
24 levels across 3 sections, about 48 minutes of play in total. It's built for five minutes a day, so you finish it a little at a time instead of all at once.
Do I need any background to start Mechanical Engineering: How Machines Work?
No. It's pitched at a beginner level, so it starts where you are and builds up. If you can tap a phone, you can start.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
Mechanical Engineering: How Machines Work is taught in the Bestie style: your friend who just gets it. 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.
More Technology on Tomo
Mechanical Engineering in Everyday Objects
Decode the physical mechanisms hidden inside tools, vehicles, and household gadgets. Learn the core vocabulary of forces, motion, and materials so you can see how the built world actually works.
The Language of Mechanical Engineering
Decode the terms engineers and mechanics use to build, fit, and troubleshoot machines. Discover the physical principles behind everyday hardware, motion systems, and material failures.
How Electricity Powers Machines
Discover how electricity transforms into mechanical motion, force, and precision. Learn to pick motors, balance speed and torque with gears, and control physical mechanisms safely.
How Everyday Mechanisms Work
See the hidden engineering inside the everyday tools and machines around you. Learn how simple components like levers, threads, pulleys, and linkages trade distance for force to make impossible tasks effortless.
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.
Everyday Mechanical Fixes
Learn why moving parts squeak, stick, slip, and strip—and how to diagnose and fix them. Build an intuitive feel for friction, fasteners, drive tension, and leverage in the physical objects around you.
Start Mechanical Engineering: How Machines Work today.
Download Tomo, search Mechanical Engineering: How Machines Work, and play your first lesson in under a minute.