---
title: A heavy box will not slide across the carpet. What trick helps most? — Friction: the grip that stops and helps · tree and pragmatics
description: A heavy box will not slide across the carpet. What trick helps most? Test 4 of lesson 6 «Friction: the grip that stops and helps» of the physics course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Test 4 · Friction: the grip that stops and helps

<!-- .ven lang=en -->
A heavy box will not slide across the carpet. What trick helps most?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** heavy box, trick · **What happens:** not slide, help · **To what, where:** carpet

<!-- .vabout -->
This is test 4 of lesson 6 «Friction: the grip that stops and helps» of the physics 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/physics/6-friction-the-grip/#t4).

## The question {#question}

<!-- .note -->
*Sentence 1:* A heavy box will not slide across the carpet.

```conllu
# sent_id = question:physics:6-friction-the-grip:t4:1
# text = A heavy box will not slide across the carpet.
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	heavy	heavy	ADJ	JJ	Degree=Pos	3	amod	_	_
3	box	box	NOUN	NN	Number=Sing	6	nsubj	_	_
4	will	will	AUX	MD	VerbForm=Fin	6	aux	_	_
5	not	not	PART	RB	Polarity=Neg	6	advmod	_	_
6	slide	slide	VERB	VB	VerbForm=Inf	0	root	_	_
7	across	across	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	carpet	carpet	NOUN	NN	Number=Sing	6	obl	_	SpaceAfter=No
10	.	.	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **slide** | future | a heavy box |  |  | the carpet |  |  | vn run-51.3.2-2 «NP V PP.location»: agent=Theme across carpet=Trajectory |

<!-- .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 trick helps most?

```conllu
# sent_id = question:physics:6-friction-the-grip:t4:2
# text = What trick helps most?
1	What	what	DET	WDT	PronType=Int	2	det	_	_
2	trick	trick	NOUN	NN	Number=Sing	3	nsubj	_	_
3	helps	help	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	most	most	ADV	RBS	Degree=Sup	3	advmod	_	SpaceAfter=No
5	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **help** | present | what trick |  |  |  |  |  | vn help-72.1-1-1 «NP V PP.theme»: agent=Agent |

## The options {#options}

### Option 1 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
Put it on a rug and drag the rug on a smooth floor

```conllu
# sent_id = question:physics:6-friction-the-grip:t4:o1:1
# text = Put it on a rug and drag the rug on a smooth floor
1	Put	put	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	1	obj	_	_
3	on	on	ADP	IN	_	5	case	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	rug	rug	NOUN	NN	Number=Sing	1	obl	_	_
6	and	and	CCONJ	CC	_	7	cc	_	_
7	drag	drag	VERB	VB	Mood=Imp|VerbForm=Fin	1	conj	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	rug	rug	NOUN	NN	Number=Sing	7	obj	_	_
10	on	on	ADP	IN	_	13	case	_	_
11	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
12	smooth	smooth	ADJ	JJ	Degree=Pos	13	amod	_	_
13	floor	floor	NOUN	NN	Number=Sing	7	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **put** | imperative | you *not said here* | it |  | a rug |  |  | vn put-9.1-2 «NP V PP.destination NP»: agent=Agent it=Theme on rug=Destination |
| 2 | **drag** | infinitive | you *not said here* | the rug |  | a smooth floor |  |  | vn carry-11.4 «NP V NP»: agent=Agent rug=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
Add more weight on top

```conllu
# sent_id = question:physics:6-friction-the-grip:t4:o2:1
# text = Add more weight on top
1	Add	add	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	more	more	ADJ	JJR	Degree=Cmp	3	amod	_	_
3	weight	weight	NOUN	NN	Number=Sing	1	obj	_	_
4	on	on	ADP	IN	_	5	case	_	_
5	top	top	NOUN	NN	Number=Sing	1	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **add** *speech: assert* | imperative | you *not said here* | more weight |  | top |  |  | vn mix-22.1-2 «NP V NP»: agent=Agent weight=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
Wet the carpet first

```conllu
# sent_id = question:physics:6-friction-the-grip:t4:o3:1
# text = Wet the carpet first
1	Wet	wet	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	carpet	carpet	NOUN	NN	Number=Sing	1	obj	_	_
4	first	first	ADV	RB	NumForm=Word|NumType=Ord	1	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **wet** | imperative | you *not said here* | the carpet |  |  |  | first *property* | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent carpet=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
Push it harder from the top

```conllu
# sent_id = question:physics:6-friction-the-grip:t4:o4:1
# text = Push it harder from the top
1	Push	push	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	1	obj	_	_
3	harder	hard	ADV	RBR	Degree=Cmp	1	advmod	_	_
4	from	from	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	top	top	NOUN	NN	Number=Sing	1	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **push** | imperative | you *not said here* | it |  | the top |  | hard *property* | vn funnel-9.3-1-1 «NP V NP PP.trajectory»: agent=Agent it=Theme from top=Trajectory |

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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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