Simple Machines quiz

More questions about Simple Machines

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   What was the Archimedes' screw first used to lift?

   Answer: Water

   Why: Ships used it too: one man with such a screw could reportedly pump out the bilge of the Syracusia, a huge Greek ship.

2. 2 Medium

   Which quantity does a fishing rod multiply at its tip?

   Answer: Speed

   Why: Your hands act close to the pivot, so a short, slow hand movement becomes a long, fast sweep of the rod's tip.

3. 3 Hard

   Who worked out the inclined plane's mechanical advantage in 1586?

   Answer: Simon Stevin

   Why: His proof draped a loop of balls over a triangle: since it cannot slide forever on its own, both slopes must balance.

4. 4 Easy

   What do Archimedes' screws turned by rivers now produce?

   Answer: Electricity

   Why: Because these turbines turn slowly, they do less harm to fish swimming through them than fast-spinning turbines.

5. 5 Medium

   Which hand tool needs more effort than the force it delivers?

   Answer: Tweezers

   Why: Your forearm works the same way: the biceps pulls between elbow and hand, so it must pull harder than the weight it lifts.

6. 6 Hard

   What is the spacing between a screw's threads called?

   Answer: Pitch

   Why: On a screw with one thread, the pitch is also how far the screw moves forward in each full turn.