---
title: If you stood on a skateboard and threw a heavy ball forward, then sw… — Rockets, record speeds and motion ever… · tree and pragmatics
description: If you stood on a skateboard and threw a heavy ball forward, then switched to throwing it backward, what would change? Test 4 · ★★★ 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 
---

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# Test 4 · ★★★ · Rockets, record speeds and motion everywhere

<!-- .ven lang=en -->
If you stood on a skateboard and threw a heavy ball forward, then switched to throwing it backward, what would change?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you · **What happens:** stand, throw, switch, change · **To what, where:** skateboard, heavy ball, ball

<!-- .vabout -->
This is test 4 · ★★★ 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/#t4).

## The question {#question}

```conllu
# sent_id = question:physics:38-rockets-record-speeds-and-motion-everywhere:t4:1
# text = If you stood on a skateboard and threw a heavy ball forward, then switched to throwing it backward, what would change?
1	If	if	SCONJ	IN	_	3	mark	_	_
2	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	3	nsubj	_	_
3	stood	stand	VERB	VBD	Mood=Ind|Number=Sing|Person=2|Tense=Past|VerbForm=Fin	0	root	_	_
4	on	on	ADP	IN	_	6	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
6	skateboard	skateboard	NOUN	NN	Number=Sing	3	obl	_	_
7	and	and	CCONJ	CC	_	8	cc	_	_
8	threw	throw	VERB	VBD	Mood=Ind|Number=Sing|Person=2|Tense=Past|VerbForm=Fin	3	conj	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
10	heavy	heavy	ADJ	JJ	Degree=Pos	11	amod	_	_
11	ball	ball	NOUN	NN	Number=Sing	8	obj	_	_
12	forward	forward	ADV	RB	_	8	advmod	_	SpaceAfter=No
13	,	,	PUNCT	,	_	15	punct	_	_
14	then	then	ADV	RB	PronType=Dem	15	advmod	_	_
15	switched	switch	VERB	VBD	Mood=Ind|Number=Sing|Person=2|Tense=Past|VerbForm=Fin	3	conj	_	_
16	to	to	SCONJ	IN	_	17	mark	_	_
17	throwing	throw	VERB	VBG	Tense=Pres|VerbForm=Part	15	advcl	_	_
18	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	17	obj	_	_
19	backward	backward	ADV	RB	_	17	advmod	_	SpaceAfter=No
20	,	,	PUNCT	,	_	23	punct	_	_
21	what	what	PRON	WP	PronType=Int	23	obj	_	_
22	would	would	AUX	MD	VerbForm=Fin	23	aux	_	_
23	change	change	VERB	VB	VerbForm=Inf	17	conj	_	SpaceAfter=No
24	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stand** | past | you |  |  | a skateboard |  |  | vn assuming\_position-50 «NP V PP.location»: agent=Agent on skateboard=Location |
| 2 | **throw** | past | you *not said here* | a heavy ball |  |  |  | forward *property* | vn throw-17.1-1-1 «NP V NP»: agent=Agent ball=Theme |
| 3 | **switch** | past | you *not said here* |  |  |  | then |  | vn convert-26.6.2-1-1 «NP V»: agent=Patient |
| 4 | **throw** | gerund | you *not said here* | ball |  |  |  | backward *property* | vn throw-17.1-1-1 «NP V NP»: agent=Agent it=Theme |
| 5 | **change** | would | you *not said here* |  |  |  |  |  | vn dress-41.1.1-1-1 «NP V NP»: agent=Agent what=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 -->
You would roll forward both times, whichever way you threw

```conllu
# sent_id = question:physics:38-rockets-record-speeds-and-motion-everywhere:t4:o1:1
# text = You would roll forward both times, whichever way you threw
1	You	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	roll	roll	VERB	VB	VerbForm=Inf	0	root	_	_
4	forward	forward	ADV	RB	_	3	advmod	_	_
5	both	both	DET	DT	PronType=Tot	6	det	_	_
6	times	time	NOUN	NNS	Number=Plur	3	obl:unmarked	_	SpaceAfter=No
7	,	,	PUNCT	,	_	9	punct	_	_
8	whichever	whichever	DET	WDT	PronType=Rel	9	det	_	_
9	way	way	NOUN	NN	Number=Sing	3	obl:unmarked	_	_
10	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	11	nsubj	_	_
11	threw	throw	VERB	VBD	Mood=Ind|Number=Sing|Person=2|Tense=Past|VerbForm=Fin	9	acl:relcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **roll forward** | would | You | whichever way |  |  | time | forward *property* | vn run-51.3.2-2 «NP V»: agent=Theme |
| 2 | **throw** | past | you | whichever way *not said here* |  |  |  |  | vn throw-17.1-1-1 «NP V NP»: agent=Agent way=Theme |

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

<!-- .ven lang=en -->
You would roll the opposite way each time

```conllu
# sent_id = question:physics:38-rockets-record-speeds-and-motion-everywhere:t4:o2:1
# text = You would roll the opposite way each time
1	You	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	roll	roll	VERB	VB	VerbForm=Inf	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
5	opposite	opposite	ADJ	JJ	Degree=Pos	6	amod	_	_
6	way	way	NOUN	NN	Number=Sing	3	obl:unmarked	_	_
7	each	each	DET	DT	PronType=Tot	8	det	_	_
8	time	time	NOUN	NN	Number=Sing	3	obl:unmarked	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **roll** | would | You | the opposite way |  |  | time |  | vn run-51.3.2-2 «NP V»: agent=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
You would stay still both times

```conllu
# sent_id = question:physics:38-rockets-record-speeds-and-motion-everywhere:t4:o3:1
# text = You would stay still both times
1	You	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	stay	stay	VERB	VB	VerbForm=Inf	0	root	_	_
4	still	still	ADV	RB	_	3	advmod	_	_
5	both	both	DET	DT	PronType=Tot	6	det	_	_
6	times	time	NOUN	NNS	Number=Plur	3	obl:unmarked	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stay** | would | You |  |  |  | still; time |  | vn exist-47.1 «NP V»: agent=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
You would roll sideways

```conllu
# sent_id = question:physics:38-rockets-record-speeds-and-motion-everywhere:t4:o4:1
# text = You would roll sideways
1	You	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	roll	roll	VERB	VB	VerbForm=Inf	0	root	_	_
4	sideways	sideways	ADV	RB	_	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **roll** | would | You |  |  |  |  | sideways *property* | vn run-51.3.2-2 «NP V»: agent=Theme |

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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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- ← previous: [Rockets, record speeds and motion ever…, test 3](https://md.mova.elamur.ai/free/en/corpora/questions/physics/38-rockets-record-speeds-and-motion-everywhere/t3/)
- next →: [Rockets, record speeds and motion ever…, test 5](https://md.mova.elamur.ai/free/en/corpora/questions/physics/38-rockets-record-speeds-and-motion-everywhere/t5/)
- ↑ 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/)