---
title: A quick stop needs a huge force, and a slow stop needs a much smalle… — Parachutes, skydivers and falling safely · tree and pragmatics
description: A quick stop needs a huge force, and a slow stop needs a much smaller one, which is why a pillow saves an egg. Who acts: quick stop, slow stop, pillow. A sentence of the lesson «Parachutes, skydivers and falling safely» of the physics course of Mova's primary school with its dependency tree and the 
---

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# Parachutes, skydivers and falling safely, sentence 13

<!-- .ven lang=en -->
A quick stop needs a huge force, and a slow stop needs a much smaller one, which is why a pillow saves an egg.

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**Who acts:** quick stop, slow stop, pillow · **What happens:** need, be, save · **To what, where:** huge force, smaller one, egg

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This is a sentence of the lesson «Parachutes, skydivers and falling safely» 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 (quick stop, slow stop, pillow), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:003-parachutes-and-falling-safely.lesson:13
# text = A quick stop needs a huge force, and a slow stop needs a much smaller one, which is why a pillow saves an egg.
# source = school lesson (ours)
# course = physics
# lesson = 003-parachutes-and-falling-safely.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	quick	quick	ADJ	JJ	Degree=Pos	3	amod	_	_
3	stop	stop	NOUN	NN	Number=Sing	4	nsubj	_	_
4	needs	need	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	huge	huge	ADJ	JJ	Degree=Pos	7	amod	_	_
7	force	force	NOUN	NN	Number=Sing	4	obj	_	_
8	,	,	PUNCT	,	_	13	punct	_	_
9	and	and	CCONJ	CC	_	13	cc	_	_
10	a	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	_
11	slow	slow	ADJ	JJ	Degree=Pos	12	amod	_	_
12	stop	stop	NOUN	NN	Number=Sing	13	nsubj	_	_
13	needs	need	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	conj	_	_
14	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
15	much	much	ADV	RB	_	16	advmod	_	_
16	smaller	small	ADJ	JJR	Degree=Cmp	17	amod	_	_
17	one	one	NOUN	NN	Number=Sing	13	obj	_	_
18	,	,	PUNCT	,	_	21	punct	_	_
19	which	which	PRON	WDT	PronType=Rel	21	nsubj	_	_
20	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	21	cop	_	_
21	why	why	ADV	WRB	PronType=Int	24	advmod	_	_
22	a	a	DET	DT	Definite=Ind|PronType=Art	23	det	_	_
23	pillow	pillow	NOUN	NN	Number=Sing	24	nsubj	_	_
24	saves	save	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	17	acl:relcl	_	_
25	an	a	DET	DT	Definite=Ind|PronType=Art	26	det	_	_
26	egg	egg	NOUN	NN	Number=Sing	24	obj	_	_
27	.	.	PUNCT	.	_	4	punct	_	_
```

## Pragmatics {#pragmatics}

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

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present | a quick stop | a huge force |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot force=Theme |
| 2 | **need** | present | a slow stop | a smaller one |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot one=Theme |
| 3 | **is** | present |  |  |  |  |  | why *property* | tree rules |
| 4 | **save** | present | a pillow | a egg |  |  |  |  | vn get-13.5.1-1 «NP V NP»: agent=Agent egg=Theme |

<!-- .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:003-parachutes-and-falling-safely.lesson:13`.

**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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