---
title: A wrecking ball gets its power from its height and weight, and it ca… — Swings and pendulums · tree and pragmatics
description: A wrecking ball gets its power from its height and weight, and it can swing back, so the area is cleared of people. Who acts: wrecking ball, ball. A sentence of the lesson «Swings and pendulums» of the physics course of Mova's primary school with its dependency tree and the pragmatics of every claus
---

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# Swings and pendulums, sentence 14

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A wrecking ball gets its power from its height and weight, and it can swing back, so the area is cleared of people.

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**Who acts:** wrecking ball, ball · **What happens:** get, swing back, clear · **To what, where:** power, height, area

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This is a sentence of the lesson «Swings and pendulums» 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 (wrecking ball, ball), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:010-swings-and-pendulums.lesson:14
# text = A wrecking ball gets its power from its height and weight, and it can swing back, so the area is cleared of people.
# source = school lesson (ours)
# course = physics
# lesson = 010-swings-and-pendulums.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	3	det	_	_
2	wrecking	wrecking	NOUN	NN	Number=Sing	3	compound	_	_
3	ball	ball	NOUN	NN	Number=Sing	4	nsubj	_	_
4	gets	get	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	6	nmod:poss	_	_
6	power	power	NOUN	NN	Number=Sing	4	obj	_	_
7	from	from	ADP	IN	_	9	case	_	_
8	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	9	nmod:poss	_	_
9	height	height	NOUN	NN	Number=Sing	4	obl	_	_
10	and	and	CCONJ	CC	_	11	cc	_	_
11	weight	weight	NOUN	NN	Number=Sing	9	conj	_	_
12	,	,	PUNCT	,	_	16	punct	_	_
13	and	and	CCONJ	CC	_	16	cc	_	_
14	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	16	nsubj	_	_
15	can	can	AUX	MD	VerbForm=Fin	16	aux	_	_
16	swing	swing	VERB	VB	VerbForm=Inf	4	conj	_	_
17	back	back	ADV	RB	_	16	advmod	_	_
18	,	,	PUNCT	,	_	23	punct	_	_
19	so	so	ADV	RB	_	23	advmod	_	_
20	the	the	DET	DT	Definite=Def|PronType=Art	21	det	_	_
21	area	area	NOUN	NN	Number=Sing	23	nsubj:pass	_	_
22	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	23	aux:pass	_	_
23	cleared	clear	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	parataxis	_	_
24	of	of	ADP	IN	_	25	case	_	_
25	people	people	NOUN	NNS	Number=Plur	23	obl	_	_
26	.	.	PUNCT	.	_	4	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **get** | present | a wrecking ball | ball's power |  | ball's height and weight |  |  | vn get-13.5.1-1 «NP V NP PP.source»: agent=Agent power=Theme from height=Source |
| 2 | **swing back** | can | ball |  |  |  |  |  | vn calibratable\_cos-45.6.1-1 «NP.attribute V»: agent=Attribute |
| 3 | **clear** | present · passive |  | the area |  |  |  | of people | vn clear-10.3-1 «NP V NP PP.source»: subject=Theme of people=Source |

<!-- .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:010-swings-and-pendulums.lesson:14`.

**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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