---
title: A single fixed pulley changes the direction of the pull but not its… — Simple machines and how they help · tree and pragmatics
description: A single fixed pulley changes the direction of the pull but not its size. Who acts: single fixed pulley. A sentence of the lesson «Simple machines and how they help» of the world course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Simple machines and how they help, sentence 17

<!-- .ven lang=en -->
A single fixed pulley changes the direction of the pull but not its size.

<!-- .vintro -->
**Who acts:** single fixed pulley · **What happens:** fix, change · **To what, where:** direction

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This is a sentence of the lesson «Simple machines and how they help» of the world 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 (single fixed pulley), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:052-simple-machines.lesson:17
# text = A single fixed pulley changes the direction of the pull but not its size.
# source = school lesson (ours)
# course = world
# lesson = 052-simple-machines.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	A	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
2	single	single	ADJ	JJ	Degree=Pos	4	amod	_	_
3	fixed	fix	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	amod	_	_
4	pulley	pulley	NOUN	NN	Number=Sing	5	nsubj	_	_
5	changes	change	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	direction	direction	NOUN	NN	Number=Sing	5	obj	_	_
8	of	of	ADP	IN	_	10	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	pull	pull	NOUN	NN	Number=Sing	7	nmod	_	_
11	but	but	CCONJ	CC	_	14	cc	_	_
12	not	not	PART	RB	Polarity=Neg	14	advmod	_	_
13	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	14	nmod:poss	_	_
14	size	size	NOUN	NN	Number=Sing	7	conj	_	_
15	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fix** | participle |  |  |  |  |  |  | vn shake-22.3-2 «NP V ADV-Middle»: agent=Patient |
| 2 | **change** | present | a single fixed pulley | the direction of the pull but pulley's size |  |  |  |  | vn dress-41.1.1-1-1 «NP V NP»: agent=Agent direction=Patient |

<!-- .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:world:052-simple-machines.lesson:17`.

**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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- ← previous: [Simple machines and how they help, 16](https://md.mova.elamur.ai/free/en/corpora/school/world/52-simple-machines/16/)
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