Simple Machines
1 / 15A seesaw on a playground is a classic example of which simple machine?
About Simple Machines
From levers and pulleys to wheels and inclined planes, discover the six clever machines behind the everyday tools we all use. Simple Machines packs 15 multiple-choice questions with a mix of 7 easy, 6 medium, 2 hard questions into a relaxed session of roughly 7 minutes — no sign-up, no timer pressure. An explanation appears after every answer, and finishing once a day keeps your streak alive.
A few sample questions
1. A seesaw on a playground is a classic example of which simple machine?
Answer: Lever
A seesaw is a lever — a rigid bar that pivots on a fixed point called a fulcrum. Levers help us lift or move objects with less effort.
2. How many classic simple machines are recognized in science?
Answer: Six
There are six classic simple machines: the lever, wheel and axle, pulley, inclined plane, wedge, and screw. Together they form the building blocks of all mechanical devices.
3. A ramp leading up to a loading dock is an example of which simple machine?
Answer: Inclined plane
An inclined plane is a flat surface set at an angle, like a ramp. It lets you move a heavy load to a higher level by spreading the effort over a longer distance.
4. Which simple machine is used when you raise a flag up a flagpole?
Answer: Pulley
A pulley is a wheel with a groove that guides a rope or cable, changing the direction of force. The flagpole uses a fixed pulley so you pull down on the rope to send the flag up.
5. An axe splitting firewood uses which simple machine?
Answer: Wedge
An axe head is a wedge — two inclined planes joined back-to-back. As it is driven downward, the wedge shape pushes the wood apart sideways, multiplying the splitting force.
Things you'll learn along the way
- The fulcrum is the support point of a lever. Moving the fulcrum closer to the load lets you lift heavier objects with less effort — the principle Archimedes famously described.
- A screw is essentially an inclined plane wrapped in a spiral around a cylinder. Each full turn moves the screw forward just a small distance, converting rotational force into powerful clamping force.
- A doorknob is a wheel and axle — a larger wheel (the knob) turns a smaller axle (the shaft). Turning the larger knob takes less force than turning the narrow shaft directly.
Frequently asked questions
Is Simple Machines free to play?
Yes. The entire SeniorBrainGames catalog — including Simple Machines — is free, with no sign-up required, no time limits, and no ads on top of the game. It also works offline once the page has loaded once.
How long does Simple Machines take?
Most players finish Simple Machines in about 7 minutes. You can pause between questions, replay it as often as you like, and there is no penalty for taking your time — answers are explained after you submit them.
What's a good follow-up after Simple Machines?
If you enjoyed this general knowledge quiz, try the Daily Challenge — five rotating questions, refreshed every 24 hours, that count toward your streak. You can also use the Surprise Me button on the homepage to land on a different game type for variety.
Can I print Simple Machines?
Yes — use the Print button at the top of the page for a clean question sheet, or "Print with Answers" to make an answer key. Printed sheets work well for group play at home, in a classroom, or at a senior center.
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