---
title: Two balls of the same size, one of steel and one of rubber, are drop… — Gravity · tree and pragmatics
description: Two balls of the same size, one of steel and one of rubber, are dropped from a low wall. What happens? Test 9 · ★ of lesson 6 «Gravity» of the world course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/world/6-gravity/t9/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [World](https://md.mova.elamur.ai/free/en/corpora/questions/world/) / [Gravity](https://md.mova.elamur.ai/free/en/corpora/questions/world/6-gravity/) / t9

# Test 9 · ★ · Gravity

<!-- .ven lang=en -->
Two balls of the same size, one of steel and one of rubber, are dropped from a low wall. What happens?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **What happens:** drop, happen · **To what, where:** Two balls, low wall

<!-- .vabout -->
This is test 9 · ★ of lesson 6 «Gravity» of the world 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/world/6-gravity/#t9).

## The question {#question}

<!-- .note -->
*Sentence 1:* Two balls of the same size, one of steel and one of rubber, are dropped from a low wall.

```conllu
# sent_id = question:world:6-gravity:t9:1
# text = Two balls of the same size, one of steel and one of rubber, are dropped from a low wall.
1	Two	two	NUM	CD	NumForm=Word|NumType=Card	2	nummod	_	_
2	balls	ball	NOUN	NNS	Number=Plur	17	nsubj	_	_
3	of	of	ADP	IN	_	6	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
5	same	same	ADJ	JJ	Degree=Pos	6	amod	_	_
6	size	size	NOUN	NN	Number=Sing	2	nmod	_	SpaceAfter=No
7	,	,	PUNCT	,	_	8	punct	_	_
8	one	one	NUM	CD	NumForm=Word|NumType=Card	6	appos	_	_
9	of	of	ADP	IN	_	10	case	_	_
10	steel	steel	NOUN	NN	Number=Sing	8	nmod	_	_
11	and	and	CCONJ	CC	_	12	cc	_	_
12	one	one	NUM	CD	NumForm=Word|NumType=Card	8	conj	_	_
13	of	of	ADP	IN	_	14	case	_	_
14	rubber	rubber	NOUN	NN	Number=Sing	12	nmod	_	SpaceAfter=No
15	,	,	PUNCT	,	_	2	punct	_	_
16	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	17	aux:pass	_	_
17	dropped	drop	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
18	from	from	ADP	IN	_	21	case	_	_
19	a	a	DET	DT	Definite=Ind|PronType=Art	21	det	_	_
20	low	low	ADJ	JJ	Degree=Pos	21	amod	_	_
21	wall	wall	NOUN	NN	Number=Sing	17	obl	_	SpaceAfter=No
22	.	.	PUNCT	.	_	17	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **drop** | present · passive |  | Two balls of the same size |  | a low wall |  |  | vn put\_direction-9.4 «NP V NP PP.destination»: subject=Theme from wall=Destination |

<!-- .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.

<!-- .note -->
*Sentence 2:* What happens?

```conllu
# sent_id = question:world:6-gravity:t9:2
# text = What happens?
1	What	what	PRON	WP	PronType=Int	2	nsubj	_	_
2	happens	happen	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	SpaceAfter=No
3	?	?	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | present |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
The steel ball lands much sooner

```conllu
# sent_id = question:world:6-gravity:t9:o1:1
# text = The steel ball lands much sooner
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	steel	steel	NOUN	NN	Number=Sing	3	compound	_	_
3	ball	ball	NOUN	NN	Number=Sing	4	nsubj	_	_
4	lands	land	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	much	much	ADV	RB	_	6	advmod	_	_
6	sooner	soon	ADV	RBR	Degree=Cmp	4	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **land** | present | the steel ball |  |  |  |  | soon *property* | vn pocket-9.10-1 «NP V»: agent=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
The rubber ball floats upward

```conllu
# sent_id = question:world:6-gravity:t9:o2:1
# text = The rubber ball floats upward
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	rubber	rubber	NOUN	NN	Number=Sing	3	compound	_	_
3	ball	ball	NOUN	NN	Number=Sing	4	nsubj	_	_
4	floats	float	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	upward	upward	ADV	RB	_	4	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **float** | present | the rubber ball |  |  |  |  | upward *property* | vn run-51.3.2-2 «NP V»: agent=Theme |

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

<!-- .ven lang=en -->
They land almost together

```conllu
# sent_id = question:world:6-gravity:t9:o3:1
# text = They land almost together
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	land	land	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	almost	almost	ADV	RB	_	4	advmod	_	_
4	together	together	ADV	RB	_	2	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **land** | present | They |  |  |  |  | together *property* | vn pocket-9.10-1 «NP V»: agent=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
The rubber ball lands much sooner

```conllu
# sent_id = question:world:6-gravity:t9:o4:1
# text = The rubber ball lands much sooner
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	rubber	rubber	NOUN	NN	Number=Sing	3	compound	_	_
3	ball	ball	NOUN	NN	Number=Sing	4	nsubj	_	_
4	lands	land	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	much	much	ADV	RB	_	6	advmod	_	_
6	sooner	soon	ADV	RBR	Degree=Cmp	4	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **land** | present | the rubber ball |  |  |  |  | soon *property* | vn pocket-9.10-1 «NP V»: agent=Theme |

<!-- 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: [Gravity, test 8](https://md.mova.elamur.ai/free/en/corpora/questions/world/6-gravity/t8/)
- next →: [Gravity, test 10](https://md.mova.elamur.ai/free/en/corpora/questions/world/6-gravity/t10/)
- ↑ back to [Gravity](https://md.mova.elamur.ai/free/en/corpora/questions/world/6-gravity/)