---
title: A car moves along a straight road at a steady speed. Which is true? — Pushes, pulls, friction and wheels · tree and pragmatics
description: A car moves along a straight road at a steady speed. Which is true? Test 1 · ★ of lesson 85 «Pushes, pulls, friction and wheels» 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.
---

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# Test 1 · ★ · Pushes, pulls, friction and wheels

<!-- .ven lang=en -->
A car moves along a straight road at a steady speed. Which is true?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** car · **What happens:** move, be · **To what, where:** steady speed

<!-- .vabout -->
This is test 1 · ★ of lesson 85 «Pushes, pulls, friction and wheels» 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/85-pushes-pulls-friction-wheels/#t1).

## The question {#question}

<!-- .note -->
*Sentence 1:* A car moves along a straight road at a steady speed.

```conllu
# sent_id = question:world:85-pushes-pulls-friction-wheels:t1:1
# text = A car moves along a straight road at a steady speed.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	car	car	NOUN	NN	Number=Sing	3	nsubj	_	_
3	moves	move	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	along	along	ADP	IN	_	7	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	straight	straight	ADJ	JJ	Degree=Pos	7	amod	_	_
7	road	road	NOUN	NN	Number=Sing	3	obl	_	_
8	at	at	ADP	IN	_	11	case	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
10	steady	steady	ADJ	JJ	Degree=Pos	11	amod	_	_
11	speed	speed	NOUN	NN	Number=Sing	3	obl	_	SpaceAfter=No
12	.	.	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **move** | present | a car |  |  | a steady speed |  | along a straight road | vn roll-51.3.1 «NP.theme V PP.source PP.trajectory PP.destination»: agent=Theme along road=Source at speed=Trajectory |

<!-- .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:* Which is true?

```conllu
# sent_id = question:world:85-pushes-pulls-friction-wheels:t1:2
# text = Which is true?
1	Which	which	PRON	WDT	PronType=Rel	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	true	true	ADJ	JJ	Degree=Pos	0	root	_	SpaceAfter=No
4	?	?	PUNCT	.	_	3	punct	_	_
```

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

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
The forward force is much bigger

```conllu
# sent_id = question:world:85-pushes-pulls-friction-wheels:t1:o1:1
# text = The forward force is much bigger
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	forward	forward	ADJ	JJ	Degree=Pos	3	amod	_	_
3	force	force	NOUN	NN	Number=Sing	6	nsubj	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
5	much	much	ADV	RB	_	6	advmod	_	_
6	bigger	big	ADJ	JJR	Degree=Cmp	0	root	_	_
```

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

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

<!-- .ven lang=en -->
The forward and backward forces are balanced

```conllu
# sent_id = question:world:85-pushes-pulls-friction-wheels:t1:o2:1
# text = The forward and backward forces are balanced
1	The	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
2	forward	forward	ADJ	JJ	Degree=Pos	5	amod	_	_
3	and	and	CCONJ	CC	_	4	cc	_	_
4	backward	backward	ADJ	JJ	Degree=Pos	2	conj	_	_
5	forces	force	NOUN	NNS	Number=Plur	7	nsubj:pass	_	_
6	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	7	aux:pass	_	_
7	balanced	balance	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **balance** | present · passive |  | the forward forces |  |  |  |  | vn spatial\_configuration-47.6-1 «PP.location V NP»: subject=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
There are no forces on the car at all

```conllu
# sent_id = question:world:85-pushes-pulls-friction-wheels:t1:o3:1
# text = There are no forces on the car at all
1	There	there	PRON	EX	PronType=Dem	2	expl	_	_
2	are	be	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	no	no	DET	DT	PronType=Neg	4	det	_	_
4	forces	force	NOUN	NNS	Number=Plur	2	nsubj	_	_
5	on	on	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	car	car	NOUN	NN	Number=Sing	2	obl	_	_
8	at	at	ADP	IN	_	9	case	_	_
9	all	all	DET	DT	PronType=Tot	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **does** | present | no forces |  |  | the car; there |  | at all | vn exist-47.1 «NP V PP.location»: agent=Theme on car=Location |

### Option 4 {#o4}

<!-- .ven lang=en -->
The backward force is much bigger

```conllu
# sent_id = question:world:85-pushes-pulls-friction-wheels:t1:o4:1
# text = The backward force is much bigger
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	backward	backward	ADJ	JJ	Degree=Pos	3	amod	_	_
3	force	force	NOUN	NN	Number=Sing	6	nsubj	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
5	much	much	ADV	RB	_	6	advmod	_	_
6	bigger	big	ADJ	JJR	Degree=Cmp	0	root	_	_
```

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

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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.

<!-- /div -->

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- ← previous: [Mirrors, shadows and colours, exam 4](https://md.mova.elamur.ai/free/en/corpora/questions/world/84-mirrors-shadows-colours/e4/)
- next →: [Pushes, pulls, friction and wheels, test 2](https://md.mova.elamur.ai/free/en/corpora/questions/world/85-pushes-pulls-friction-wheels/t2/)
- ↑ back to [Pushes, pulls, friction and wheels](https://md.mova.elamur.ai/free/en/corpora/questions/world/85-pushes-pulls-friction-wheels/)