---
title: A lever is a stiff bar that turns around a point called the pivot. — Simple machines and how they help · tree and pragmatics
description: A lever is a stiff bar that turns around a point called the pivot. Who acts: lever, stiff bar, point. 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 2

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A lever is a stiff bar that turns around a point called the pivot.

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**Who acts:** lever, stiff bar, point · **What happens:** be, turn, call · **To what, where:** stiff bar, point, pivot · **Speech:** someone speaks here

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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 (lever, stiff bar, point), 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:2
# text = A lever is a stiff bar that turns around a point called the pivot.
# 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	2	det	_	_
2	lever	lever	NOUN	NN	Number=Sing	6	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	stiff	stiff	ADJ	JJ	Degree=Pos	6	amod	_	_
6	bar	bar	NOUN	NN	Number=Sing	0	root	_	_
7	that	that	PRON	WDT	PronType=Rel	8	nsubj	_	_
8	turns	turn	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	acl:relcl	_	_
9	around	around	ADP	IN	_	11	case	_	_
10	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
11	point	point	NOUN	NN	Number=Sing	8	obl	_	_
12	called	call	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	11	acl	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	pivot	pivot	NOUN	NN	Number=Sing	12	obj	_	_
15	.	.	PUNCT	.	_	6	punct	_	_
```

## Pragmatics {#pragmatics}

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

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | a lever | a stiff bar |  |  |  |  | tree rules |
| 2 | **turn** | present | a stiff bar |  |  | a point |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme around point=Trajectory |
| 3 | **call** | participle | a point *not said here* | the pivot |  |  |  |  | vn initiate\_communication-37.4.2-1 «NP V NP.recipient»: agent=Agent pivot=Recipient |

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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:2`.

**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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<!-- pn -->
- ← previous: [Simple machines and how they help, 1](https://md.mova.elamur.ai/free/en/corpora/school/world/52-simple-machines/1/)
- next →: [Simple machines and how they help, 3](https://md.mova.elamur.ai/free/en/corpora/school/world/52-simple-machines/3/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/world/52-simple-machines/)