---
title: Two magnets lie on a table and slide away from each other when broug… — Forces — pushes, pulls, friction and m… · tree and pragmatics
description: Two magnets lie on a table and slide away from each other when brought close. What must be facing each other? Test 3 of lesson 51 «Forces — pushes, pulls, friction and magnets» of the world course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; M
---

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# Test 3 · Forces — pushes, pulls, friction and magnets

<!-- .ven lang=en -->
Two magnets lie on a table and slide away from each other when brought close. What must be facing each other?

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 4 · wrong ✗ · **Who acts:** Two magnets · **What happens:** lie, slide away, bring, face · **To what, where:** table, each

<!-- .vabout -->
This is test 3 of lesson 51 «Forces — pushes, pulls, friction and magnets» of the world course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/world/51-forces/#t3).

## The question {#question}

<!-- .note -->
*Sentence 1:* Two magnets lie on a table and slide away from each other when brought close.

```conllu
# sent_id = question:world:51-forces:t3:1
# text = Two magnets lie on a table and slide away from each other when brought close.
1	Two	two	NUM	CD	NumForm=Word|NumType=Card	2	nummod	_	_
2	magnets	magnet	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	lie	lie	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	on	on	ADP	IN	_	6	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
6	table	table	NOUN	NN	Number=Sing	3	obl	_	_
7	and	and	CCONJ	CC	_	8	cc	_	_
8	slide	slide	VERB	VB	VerbForm=Inf	3	conj	_	_
9	away	away	ADV	RB	_	8	advmod	_	_
10	from	from	ADP	IN	_	11	case	_	_
11	each	each	DET	DT	ExtPos=PRON|PronType=Rcp	8	obl	_	_
12	other	other	ADJ	JJ	Degree=Pos	11	fixed	_	_
13	when	when	ADV	WRB	PronType=Int	14	advmod	_	_
14	brought	bring	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	conj	_	_
15	close	close	ADV	RB	Degree=Pos	14	advmod	_	SpaceAfter=No
16	.	.	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **lie** | present | Two magnets |  |  | a table |  |  | vn assuming\_position-50 «NP V PP.location»: agent=Agent on table=Location |
| 2 | **slide away** | infinitive | Two magnets *not said here* |  |  | each |  | away *property* | vn run-51.3.2-2 «NP V PP.location»: agent=Theme from each=Trajectory |
| 3 | **bring** | participle | Two magnets *not said here* |  |  |  |  | close *property* | vn bring-11.3-1 «NP V NP together»: agent=Agent |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

<!-- .note -->
*Sentence 2:* What must be facing each other?

```conllu
# sent_id = question:world:51-forces:t3:2
# text = What must be facing each other?
1	What	what	PRON	WP	PronType=Int	4	obj	_	_
2	must	must	AUX	MD	VerbForm=Fin	4	aux	_	_
3	be	be	AUX	VB	VerbForm=Inf	4	aux	_	_
4	facing	face	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	_	_
5	each	each	DET	DT	ExtPos=PRON|PronType=Rcp	4	obj	_	_
6	other	other	ADJ	JJ	Degree=Pos	5	fixed	_	SpaceAfter=No
7	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **face** | must · progressive |  | each |  |  |  |  | tree rules |

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Nothing, magnets always move apart

```conllu
# sent_id = question:world:51-forces:t3:o1:1
# text = Nothing, magnets always move apart
1	Nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	3	compound	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	magnets	magnet	NOUN	NNS	Number=Plur	5	nsubj	_	_
4	always	always	ADV	RB	PronType=Tot	5	advmod	_	_
5	move	move	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	apart	apart	ADV	RB	_	5	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **move** | present | Nothing magnets |  |  |  |  | always, apart *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
A pole and the middle of the other magnet

```conllu
# sent_id = question:world:51-forces:t3:o2:1
# text = A pole and the middle of the other magnet
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	pole	pole	NOUN	NN	Number=Sing	0	root	_	_
3	and	and	CCONJ	CC	_	5	cc	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	middle	middle	NOUN	NN	Number=Sing	2	conj	_	_
6	of	of	ADP	IN	_	9	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
8	other	other	ADJ	JJ	Degree=Pos	9	amod	_	_
9	magnet	magnet	NOUN	NN	Number=Sing	5	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
A north pole and a south pole

```conllu
# sent_id = question:world:51-forces:t3:o3:1
# text = A north pole and a south pole
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	north	north	ADJ	JJ	Degree=Pos	3	amod	_	_
3	pole	pole	NOUN	NN	Number=Sing	0	root	_	_
4	and	and	CCONJ	CC	_	7	cc	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	south	South	ADJ	JJ	Degree=Pos	7	amod	_	_
7	pole	pole	NOUN	NN	Number=Sing	3	conj	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
Two like poles, such as south and south

```conllu
# sent_id = question:world:51-forces:t3:o4:1
# text = Two like poles, such as south and south
1	Two	two	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
2	like	like	ADP	IN	_	3	case	_	_
3	poles	pole	NOUN	NNS	Number=Plur	0	root	_	SpaceAfter=No
4	,	,	PUNCT	,	_	7	punct	_	_
5	such	such	ADJ	JJ	Degree=Pos|ExtPos=ADP	7	case	_	_
6	as	as	ADP	IN	_	5	fixed	_	_
7	south	south	ADV	RB	_	3	advmod	_	_
8	and	and	CCONJ	CC	_	9	cc	_	_
9	south	south	ADV	RB	_	7	conj	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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