---
title: On the Moon, where there is no air, an astronaut dropped a hammer an… — Why things fall: the apple and the pull of the E… · tree and pragmatics
description: On the Moon, where there is no air, an astronaut dropped a hammer and a feather, and they landed at exactly the same moment. Who acts: air, astronaut, feather. A sentence of the lesson «Why things fall: the apple and the pull of the Earth» of the physics course of Mova's primary school with its depe
---

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# Why things fall: the apple and the pull of the Earth, sentence 4

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On the Moon, where there is no air, an astronaut dropped a hammer and a feather, and they landed at exactly the same moment.

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**Who acts:** air, astronaut, feather · **What happens:** be, drop, land · **To what, where:** hammer, Moon

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This is a sentence of the lesson «Why things fall: the apple and the pull of the Earth» 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 (air, astronaut, feather), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:001-why-things-fall.lesson:4
# text = On the Moon, where there is no air, an astronaut dropped a hammer and a feather, and they landed at exactly the same moment.
# source = school lesson (ours)
# course = physics
# lesson = 001-why-things-fall.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	On	on	ADP	IN	_	3	case	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	Moon	Moon	PROPN	NNP	Number=Sing	13	obl	_	_
4	,	,	PUNCT	,	_	3	punct	_	_
5	where	where	ADV	WRB	PronType=Rel	7	advmod	_	_
6	there	there	PRON	EX	PronType=Dem	7	expl	_	_
7	is	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	acl:relcl	_	_
8	no	no	DET	DT	PronType=Neg	9	det	_	_
9	air	air	NOUN	NN	Number=Sing	7	nsubj	_	_
10	,	,	PUNCT	,	_	13	punct	_	_
11	an	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	_
12	astronaut	astronaut	NOUN	NN	Number=Sing	13	nsubj	_	_
13	dropped	drop	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
14	a	a	DET	DT	Definite=Ind|PronType=Art	15	det	_	_
15	hammer	hammer	NOUN	NN	Number=Sing	13	obj	_	_
16	and	and	CCONJ	CC	_	18	cc	_	_
17	a	a	DET	DT	Definite=Ind|PronType=Art	18	det	_	_
18	feather	feather	NOUN	NN	Number=Sing	15	conj	_	_
19	,	,	PUNCT	,	_	22	punct	_	_
20	and	and	CCONJ	CC	_	22	cc	_	_
21	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	22	nsubj	_	_
22	landed	land	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	13	conj	_	_
23	at	at	ADP	IN	_	27	case	_	_
24	exactly	exactly	ADV	RB	_	27	advmod	_	_
25	the	the	DET	DT	Definite=Def|PronType=Art	27	det	_	_
26	same	same	ADJ	JJ	Degree=Pos	27	amod	_	_
27	moment	moment	NOUN	NN	Number=Sing	22	obl	_	_
28	.	.	PUNCT	.	_	13	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 | **be** | present | no air |  |  | there |  |  | vn exist-47.1 «NP V»: agent=Theme |
| 2 | **drop** | past | a astronaut | a hammer and a feather |  | the Moon |  |  | vn put\_direction-9.4 «NP V NP PP.destination»: agent=Agent hammer=Theme on moon=Destination |
| 3 | **land** | past | feather |  |  |  | moment |  | vn pocket-9.10-1 «NP 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.

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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:001-why-things-fall.lesson:4`.

**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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