---
title: Why might a satellite need to be launched from near the equator, whe… — Rockets, record speeds and motion ever… · tree and pragmatics
description: Why might a satellite need to be launched from near the equator, where the ground spins fastest? Test 8 · ★★★ of lesson 38 «Rockets, record speeds and motion everywhere» of the physics course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's
---

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# Test 8 · ★★★ · Rockets, record speeds and motion everywhere

<!-- .ven lang=en -->
Why might a satellite need to be launched from near the equator, where the ground spins fastest?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 2 · wrong ✗ · **Who acts:** ground · **What happens:** launch, spin · **To what, where:** equator

<!-- .vabout -->
This is test 8 · ★★★ of lesson 38 «Rockets, record speeds and motion everywhere» 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/38-rockets-record-speeds-and-motion-everywhere/#t8).

## The question {#question}

```conllu
# sent_id = question:physics:38-rockets-record-speeds-and-motion-everywhere:t8:1
# text = Why might a satellite need to be launched from near the equator, where the ground spins fastest?
1	Why	why	ADV	WRB	PronType=Int	18	advmod	_	_
2	might	might	AUX	MD	VerbForm=Fin	18	aux	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	satellite	satellite	NOUN	NN	Number=Sing	5	compound	_	_
5	need	need	NOUN	NN	Number=Sing	18	nsubj	_	_
6	to	to	PART	TO	_	8	mark	_	_
7	be	be	AUX	VB	VerbForm=Inf	8	aux:pass	_	_
8	launched	launch	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	5	acl	_	_
9	from	from	ADP	IN	_	12	case	_	_
10	near	near	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	equator	equator	NOUN	NN	Number=Sing	8	obl	_	SpaceAfter=No
13	,	,	PUNCT	,	_	17	punct	_	_
14	where	where	ADV	WRB	PronType=Rel	17	advmod	_	_
15	the	the	DET	DT	Definite=Def|PronType=Art	16	det	_	_
16	ground	ground	NOUN	NN	Number=Sing	17	nsubj	_	_
17	spins	spin	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	18	advcl	_	_
18	fastest	fast	ADJ	JJS	Degree=Sup	0	root	_	SpaceAfter=No
19	?	?	PUNCT	.	_	18	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **launch** | to-infinitive · passive |  |  |  | the equator |  |  | vn throw-17.1-1-1 «NP V NP PP.initial\_location»: from equator=Initial\_Location |
| 2 | **spin** | present | the ground |  |  |  |  |  | vn roll-51.3.1 «NP.theme V»: agent=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.

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Gravity is switched off at the equator, so lifting is easy

```conllu
# sent_id = question:physics:38-rockets-record-speeds-and-motion-everywhere:t8:o1:1
# text = Gravity is switched off at the equator, so lifting is easy
1	Gravity	gravity	NOUN	NN	Number=Sing	3	nsubj:pass	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	switched	switch	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	off	off	ADP	RP	_	3	compound:prt	_	_
5	at	at	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	equator	equator	NOUN	NN	Number=Sing	3	obl	_	SpaceAfter=No
8	,	,	PUNCT	,	_	12	punct	_	_
9	so	so	ADV	RB	_	12	advmod	_	_
10	lifting	lifting	NOUN	NN	Number=Sing	12	nsubj	_	_
11	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	cop	_	_
12	easy	easy	ADJ	JJ	Degree=Pos	3	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **switch off** | present · passive |  | Gravity |  | the equator |  |  | vn convert-26.6.2-1-1 «NP V NP»: subject=Patient |
| 2 | **is** | present | lifting |  |  |  |  | easy *property* | tree rules |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
The Earth's spin gives it a free sideways start

```conllu
# sent_id = question:physics:38-rockets-record-speeds-and-motion-everywhere:t8:o2:1
# text = The Earth's spin gives it a free sideways start
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Earth	Earth	PROPN	NNP	Number=Sing	4	nmod:poss	_	SpaceAfter=No
3	's	's	PART	POS	_	2	case	_	_
4	spin	spin	NOUN	NN	Number=Sing	5	nsubj	_	_
5	gives	give	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	5	obj	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
8	free	free	ADJ	JJ	Degree=Pos	10	amod	_	_
9	sideways	sideways	ADJ	JJ	Degree=Pos	10	compound	_	_
10	start	start	NOUN	NN	Number=Sing	5	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **give** | present | the Earth's spin | Earth |  |  |  |  | vn give-13.1-1 «NP V NP-Dative NP»: agent=Agent it=Recipient start=Theme |
| 2 | **spin** |  | the Earth |  |  |  |  |  | nom spin «event transitive»: poss=agent |

### Option 3 {#o3}

<!-- .ven lang=en -->
The Moon helps pull it up

```conllu
# sent_id = question:physics:38-rockets-record-speeds-and-motion-everywhere:t8:o3:1
# text = The Moon helps pull it up
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Moon	Moon	PROPN	NNP	Number=Sing	3	nsubj	_	_
3	helps	help	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	pull	pull	VERB	VB	VerbForm=Inf	3	xcomp	_	_
5	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	obj	_	_
6	up	up	ADP	RP	_	4	compound:prt	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **help** | present | the Moon |  |  |  |  |  | vn help-72.1-1-1 «NP V NP S\_INF»: agent=Agent clause=Theme |
| 2 | **pull up** | infinitive | the Moon *not said here* | Moon |  |  |  |  | vn push-12-1 «NP V NP»: agent=Agent it=Theme |

### Option 4 · ← Mova's choice {#o4}

<!-- .ven lang=en -->
The air is thinner there

```conllu
# sent_id = question:physics:38-rockets-record-speeds-and-motion-everywhere:t8:o4:1
# text = The air is thinner there
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	air	air	NOUN	NN	Number=Sing	4	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
4	thinner	thin	ADJ	JJR	Degree=Cmp	0	root	_	_
5	there	there	ADV	RB	PronType=Dem	4	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | the air |  |  | there |  | thin *property* | tree rules |

<!-- div src -->

**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.

<!-- /div -->

<!-- pn -->
- ← previous: [Rockets, record speeds and motion ever…, test 7](https://md.mova.elamur.ai/free/en/corpora/questions/physics/38-rockets-record-speeds-and-motion-everywhere/t7/)
- next →: [Rockets, record speeds and motion ever…, test 9](https://md.mova.elamur.ai/free/en/corpora/questions/physics/38-rockets-record-speeds-and-motion-everywhere/t9/)
- ↑ back to [Rockets, record speeds and motion everywhere](https://md.mova.elamur.ai/free/en/corpora/questions/physics/38-rockets-record-speeds-and-motion-everywhere/)