Wheels, axles, ramps and screws
Tests: 5 of 11 right · Exam: 0 of 4 right · Kind: ★ · Understood: 6 of 15 · Run: 2026-10-18, commit f3c23ea72
Lesson 34 of the physics course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: the lesson in the corpora.
Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.
Test 1 · ★ · right ✓
ugh the handle came off the door and now i can't open it with the stupid little bar. why's it so hard?
- 1. The bar is much heavier than the handle — no support
- 2. The bar is broken inside — no support
- 3. Doors lock themselves tight the moment the handle comes off — score 5
- 4. Without the big handle, you lose the wheel's extra twist — ← Mova's choice · ✓ the right answer · score 7
Why: It took the question to ask why something happens (its cause). It chose option 4 with score 7, against 5 for the next best. Its support: lesson 34, line 1: «Try turning the thin metal bar inside a door when the handle has come off: it is really hard, yet with the handle on it turns with one finger; the handle is a…», reached through the same lesson line as the sentence the question matched. What matched: the same action «turn» (+5); the same doer «big wheel» (+2). · the question and its options parsed, with trees and pragmatics
Test 2 · ★ · wrong ✗
Sam says a steeper ramp is always better because it is shorter. What's the catch?
- 1. A steeper ramp is always far too slippery — ← Mova's choice · no support
- 2. A shorter ramp breaks more easily under weight — no support
- 3. There's no catch at all, Sam is quite right — no support
- 4. A steeper ramp needs a bigger push — ✓ the right answer · no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 3 · ★ · wrong ✗
A walker climbs a mountain by a zigzag path instead of straight up. What does she gain and lose?
- 1. Each step is easier and the path is shorter — ← Mova's choice · no support
- 2. Each step is easier, but she walks further — ✓ the right answer · no support
- 3. Each step is harder, but she walks less — no support
- 4. She gains nothing and loses time — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 4 · ★ · wrong ✗
In a cartoon, a knight pushes his cart straight up a cliff. What would a real engineer build?
- 1. Square wheels on the cart, so it grips the rock better — ← Mova's choice · no support
- 2. A heavier cart — no support
- 3. A long, gentle ramp or a zigzag road — ✓ the right answer · no support
- 4. A taller cliff — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 5 · ★ · right ✓
If wheels had never been invented, what would happen to moving heavy things?
- 1. It would be much harder, because sliding has far more friction — ← Mova's choice · ✓ the right answer · no support
- 2. Nothing would need moving — no support
- 3. It would be easier, because boxes slide better — no support
- 4. It would be just as easy — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 6 · ★ · wrong ✗
Your mate pushes the roundabout from near the middle and it barely moves. What do you tell him?
- 1. Sit on it first — no support
- 2. Push harder near the middle, it just needs more muscle — ← Mova's choice · score 5
- 3. Push the axle directly — no support
- 4. Push at the edge, it turns more easily — ✓ the right answer · score 2
Why: It took the question to ask what it is done to. It chose option 2 with score 5, against 2 for the next best. Its support: lesson 1, line 2: «The Earth is so huge that its pull is the one we feel: it tugs every apple, ball and child towards its middle.», reached through the remembered sentence the question matched. What matched: the same place «middle» (+4); the same action «tug» (+3). Against it: a different doer (counts against) (-2). The right option, 4, scored 2. · the question and its options parsed, with trees and pragmatics
Test 7 · ★ · wrong ✗
How could you hold two bits of wood together really tightly without glue?
- 1. Push a rolling pin over them — ← Mova's choice · no support
- 2. Drive a screw through them — ✓ the right answer · no support
- 3. Rest a door stop against them — no support
- 4. Tie a wheel to them — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 8 · ★ · right ✓
Why is an axe thin at the edge and wide at the back?
- 1. It is a wedge that forces the wood apart — ← Mova's choice · ✓ the right answer · no support
- 2. It is just the old fashion for axes, nothing more — no support
- 3. The thin edge holds more heat and burns the wood — no support
- 4. The wide back makes the whole axe lighter to swing — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 9 · ★ · right ✓
Kai's jar lid won't come off. Which simple machine is the lid?
- 1. A lever — no support
- 2. A wedge — no support
- 3. A pulley — no support
- 4. A screw — ← Mova's choice · ✓ the right answer · score 9
Why: It took the question to ask who or what does it. It chose option 4 with score 9, the only option with support. Its support: lesson 34, line 3: «A screw is a ramp wrapped round a rod: each turn creeps it in a little way with a big push, and jar lids and bottle caps are screws too.», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+5); the same doer «screw» (+4). · the question and its options parsed, with trees and pragmatics
Test 10 · ★ · wrong ✗
shut up and turn the tap, it's taking ages. why so many turns tho
- 1. The water is stuck in the pipes — no support
- 2. The tap is broken and slipping — no support
- 3. The tap is a screw that moves the valve only a little each turn — ✓ the right answer · score 2
- 4. Taps open faster if you shout — ← Mova's choice · score 7
Why: It took the question to ask which statement is true. It chose option 4 with score 7, against 2 for the next best. Its support: lesson 34, line 15: «A tap's handle turns a screw thread that moves a valve up and down a little, which is why some taps need many turns to open fully.», reached through a sentence linked to the one the question matched. What matched: the same action «open» (+4); the same doer «taps» (+3). The right option, 3, scored 2. · the question and its options parsed, with trees and pragmatics
Test 11 · ★ · right ✓
Why do the riders at the edge of a roundabout scream more?
- 1. They are heavier than the others — no support
- 2. They go round faster than the riders in the middle — ← Mova's choice · ✓ the right answer · score 3
- 3. The edge of the roundabout spins the other way to the middle — no support
- 4. The middle is warmer — no support
Why: It took the question to ask why something happens (its cause). It chose option 2 with score 3, the only option with support. Its support: lesson 34, line 12: «On a playground roundabout, a push at the edge turns it more easily than a push near the middle, and riders at the edge move faster.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «riders» (+2); the same property (+1). · the question and its options parsed, with trees and pragmatics
Exam question 1 · formal language · wrong ✗
Identify the simple machine of which a screw is a modified form.
- 1. A pulley from which the rope has been removed — ← Mova's choice · no support
- 2. A wheel which has been deprived of its axle — no support
- 3. An inclined plane wrapped about a cylinder — ✓ the right answer · no support
- 4. A lever bent round so as to form a complete circle — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 2 · formal language · wrong ✗
Ascertain the principal reason for which mountain roads are constructed in a zigzag pattern.
- 1. The distance is reduced at the cost of a steeper gradient — ← Mova's choice · no support
- 2. The rock prevents the construction of straight roads — no support
- 3. Drivers are thereby prevented from sleeping — no support
- 4. The gradient is reduced at the cost of a greater distance — ✓ the right answer · no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 3 · formal language · wrong ✗
Which of the following statements most accurately characterises the advantage of rolling over sliding?
- 1. Rolling requires a steeper surface — ← Mova's choice · no support
- 2. Rolling eliminates the force of gravity upon the load entirely — no support
- 3. Rolling increases the weight of the load — no support
- 4. Rolling occasions considerably less friction — ✓ the right answer · no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 4 · formal language · wrong ✗
Select the response consistent with the established facts concerning the wheel and axle.
- 1. A force applied to the axle produces a greater turning effect upon the wheel — ← Mova's choice · score 6
- 2. The wheel and axle create energy for the operator — score 5
- 3. The wheel and axle function solely upon inclined surfaces — no support
- 4. A force applied to the larger wheel produces a greater turning effect upon the axle — ✓ the right answer · score 6
Why: It took the question to ask which statement is true. It chose option 1 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 34, line 6: «A wheel and axle turns a big wheel with a small force into a strong twist on the small axle; door handles, steering wheels, taps and fat screwdriver handles us…», reached through the remembered sentence the question matched. What matched: the same circumstance (+5); the same action «use» (+3). Against it: a different thing acted on (counts against) (-2). The right option, 4, scored 6. · the question and its options parsed, with trees and pragmatics
This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/physics/34-wheels-axles-ramps-and-screws/