---
title: Rub your hands together on a cold day and they warm up: friction alw… — Friction: the grip that stops and helps · tree and pragmatics
description: Rub your hands together on a cold day and they warm up: friction always turns some movement into heat. Who acts: you, hands, friction. A sentence of the lesson «Friction: the grip that stops and helps» of the physics course of Mova's primary school with its dependency tree and the pragmatics of ever
---

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# Friction: the grip that stops and helps, sentence 3

<!-- .ven lang=en -->
Rub your hands together on a cold day and they warm up: friction always turns some movement into heat.

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**Who acts:** you, hands, friction · **What happens:** rub, warm up, turn · **To what, where:** hands, movement, heat

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This is a sentence of the lesson «Friction: the grip that stops and helps» of the physics course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (you, hands, friction), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:006-friction-the-grip.lesson:3
# text = Rub your hands together on a cold day and they warm up: friction always turns some movement into heat.
# source = school lesson (ours)
# course = physics
# lesson = 006-friction-the-grip.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): no change
1	Rub	rub	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	3	nmod:poss	_	_
3	hands	hand	NOUN	NNS	Number=Plur	1	obj	_	_
4	together	together	ADV	RB	_	1	advmod	_	_
5	on	on	ADP	IN	_	8	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	cold	cold	ADJ	JJ	Degree=Pos	8	amod	_	_
8	day	day	NOUN	NN	Number=Sing	1	obl	_	_
9	and	and	CCONJ	CC	_	11	cc	_	_
10	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	11	nsubj	_	_
11	warm	warm	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	1	conj	_	_
12	up	up	ADP	RP	_	11	compound:prt	_	_
13	:	:	PUNCT	:	_	16	punct	_	_
14	friction	friction	NOUN	NN	Number=Sing	16	nsubj	_	_
15	always	always	ADV	RB	PronType=Tot	16	advmod	_	_
16	turns	turn	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	conj	_	_
17	some	some	DET	DT	PronType=Ind	18	det	_	_
18	movement	movement	NOUN	NN	Number=Sing	16	obj	_	_
19	into	into	ADP	IN	_	20	case	_	_
20	heat	heat	NOUN	NN	Number=Sing	16	obl	_	_
21	.	.	PUNCT	.	_	1	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: command
- act: request
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **rub** | imperative | you *not said here* | your hands |  |  | day | together *property* | vn spray-9.7-1 «NP V NP.theme»: agent=Agent hand=Theme |
| 2 | **warm up** | present | hands *= hand* |  |  |  |  |  | vn cooking-45.3 «NP.patient V»: agent=Patient |
| 3 | **turn** | present | friction | some movement |  | heat |  | always *property* | vn roll-51.3.1 «NP V NP PP.trajectory»: agent=Agent movement=Theme into heat=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.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:physics:006-friction-the-grip.lesson:3`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): no change. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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