---
title: Why does a car have an airbag? — Parachutes, skydivers and falling safely · tree and pragmatics
description: Why does a car have an airbag? Test 9 · ★ of lesson 3 «Parachutes, skydivers and falling safely» of the physics course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Test 9 · ★ · Parachutes, skydivers and falling safely

<!-- .ven lang=en -->
Why does a car have an airbag?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** car · **What happens:** have · **To what, where:** airbag

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This is test 9 · ★ of lesson 3 «Parachutes, skydivers and falling safely» of the physics course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/physics/3-parachutes-and-falling-safely/#t9).

## The question {#question}

```conllu
# sent_id = question:physics:3-parachutes-and-falling-safely:t9:1
# text = Why does a car have an airbag?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	aux	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	car	car	NOUN	NN	Number=Sing	5	nsubj	_	_
5	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	an	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	airbag	airbag	NOUN	NN	Number=Sing	5	obj	_	SpaceAfter=No
8	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present · do-support | a car | a airbag |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent airbag=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.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
It makes the car lighter in a crash

```conllu
# sent_id = question:physics:3-parachutes-and-falling-safely:t9:o1:1
# text = It makes the car lighter in a crash
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	car	car	NOUN	NN	Number=Sing	2	obj	_	_
5	lighter	light	ADJ	JJR	Degree=Cmp	2	xcomp	_	_
6	in	in	ADP	IN	_	8	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
8	crash	crash	NOUN	NN	Number=Sing	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | It | the car |  |  |  | light *property* | vn build-26.1-1 «NP.material V NP»: agent=Material car=Product |

### Option 2 {#o2}

<!-- .ven lang=en -->
It keeps the air fresh

```conllu
# sent_id = question:physics:3-parachutes-and-falling-safely:t9:o2:1
# text = It keeps the air fresh
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	keeps	keep	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	air	air	NOUN	NN	Number=Sing	2	obj	_	_
5	fresh	fresh	ADJ	JJ	Degree=Pos	2	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | present | It | the air |  |  |  | fresh *property* | vn keep-15.2 «NP V NP»: agent=Agent air=Theme |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
It makes the stop of your body slower and gentler

```conllu
# sent_id = question:physics:3-parachutes-and-falling-safely:t9:o3:1
# text = It makes the stop of your body slower and gentler
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	stop	stop	NOUN	NN	Number=Sing	2	obj	_	_
5	of	of	ADP	IN	_	7	case	_	_
6	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	7	nmod:poss	_	_
7	body	body	NOUN	NN	Number=Sing	4	nmod	_	_
8	slower	slow	ADJ	JJR	Degree=Cmp	2	xcomp	_	_
9	and	and	CCONJ	CC	_	10	cc	_	_
10	gentler	gentle	ADJ	JJR	Degree=Cmp	8	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | It | the stop of your body |  |  |  | slow *property* | vn build-26.1-1 «NP.material V NP»: agent=Material stop=Product |
| 2 | **stop** |  |  | your body |  |  |  |  | nom stop «event transitive»: of=patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
It pushes the car away from the other car in a crash

```conllu
# sent_id = question:physics:3-parachutes-and-falling-safely:t9:o4:1
# text = It pushes the car away from the other car in a crash
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	pushes	push	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	car	car	NOUN	NN	Number=Sing	2	obj	_	_
5	away	away	ADV	RB	_	2	advmod	_	_
6	from	from	ADP	IN	_	9	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
8	other	other	ADJ	JJ	Degree=Pos	9	amod	_	_
9	car	car	NOUN	NN	Number=Sing	2	obl	_	_
10	in	in	ADP	IN	_	12	case	_	_
11	a	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	_
12	crash	crash	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **push away** | present | It | the car |  | the other car |  | in a crash; away *property* | vn funnel-9.3-1-1 «NP V NP PP.trajectory»: agent=Agent car=Theme from car=Trajectory |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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