--- title: Every object acts as if all its weight sat at one point, its centre… — Balance: the centre of gravity · tree and pragmatics description: Every object acts as if all its weight sat at one point, its centre of gravity, and it balances when that point is right above what holds it up. Who acts: object, weight, point. A sentence of the lesson «Balance: the centre of gravity» of the physics course of Mova's primary school with its dependen --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/physics/8-balance-the-centre-of-gravity/0/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Physics](https://md.mova.elamur.ai/free/en/corpora/school/physics/) / [Balance: the centre of gravity](https://md.mova.elamur.ai/free/en/corpora/school/physics/8-balance-the-centre-of-gravity/) / 0 # Balance: the centre of gravity, sentence 0 Every object acts as if all its weight sat at one point, its centre of gravity, and it balances when that point is right above what holds it up. **Who acts:** object, weight, point · **What happens:** act, sit, balance, be, hold up · **To what, where:** one point, point This is a sentence of the lesson «Balance: the centre of gravity» 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 (object, weight, point), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:physics:008-balance-the-centre-of-gravity.lesson:0 # text = Every object acts as if all its weight sat at one point, its centre of gravity, and it balances when that point is right above what holds it up. # source = school lesson (ours) # course = physics # lesson = 008-balance-the-centre-of-gravity.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): R5-strong ×1, R8-pos-agree ×1 1 Every every DET DT PronType=Tot 2 det _ _ 2 object object NOUN NN Number=Sing 3 nsubj _ _ 3 acts act VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 4 as as SCONJ IN _ 9 mark _ _ 5 if if SCONJ IN _ 9 mark _ _ 6 all all DET PDT PronType=Tot 8 det _ Agree=R8-pos-agree|Haiku=8:det|HaikuPos=DET:DT:PronType=Tot 7 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 8 nmod:poss _ _ 8 weight weight NOUN NN Number=Sing 9 nsubj _ _ 9 sat sit VERB VBD Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin 3 advcl _ _ 10 at at ADP IN _ 12 case _ _ 11 one one NUM CD NumForm=Word|NumType=Card 12 nummod _ _ 12 point point NOUN NN Number=Sing 9 obl _ _ 13 , , PUNCT , _ 15 punct _ _ 14 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 15 nmod:poss _ _ 15 centre centre NOUN NN Number=Sing 12 appos _ _ 16 of of ADP IN _ 17 case _ _ 17 gravity gravity NOUN NN Number=Sing 15 nmod _ _ 18 , , PUNCT , _ 21 punct _ _ 19 and and CCONJ CC _ 21 cc _ _ 20 it it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 21 nsubj _ _ 21 balances balance VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 3 conj _ Agree=R5-strong|Haiku=9:conj 22 when when ADV WRB PronType=Int 26 advmod _ _ 23 that that DET DT Number=Sing|PronType=Dem 24 det _ _ 24 point point NOUN NN Number=Sing 26 nsubj _ _ 25 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 26 cop _ _ 26 right right ADJ JJ Degree=Pos 21 advcl _ _ 27 above above ADP IN _ 29 case _ _ 28 what what PRON WP PronType=Int 29 nsubj _ _ 29 holds hold VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 26 obl _ _ 30 it it PRON PRP Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs 29 obj _ _ 31 up up ADP RP _ 29 compound:prt _ _ 32 . . PUNCT . _ 3 punct _ _ ``` ## Pragmatics {#pragmatics} No stored speech act for this sentence. | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **act** | present | every object | | | | | | vn act-114-1-1 «NP V»: agent=Agent | | 2 | **sit** | past | object's weight | | | one point | | | vn assuming\_position-50 «NP V PP.location»: agent=Agent at point=Location | | 3 | **balance** | present | weight | | | | | | vn spatial\_configuration-47.6-1 «NP V»: agent=Theme | | 4 | **is** | present | that point | | | | | right *property* | tree rules | | 5 | **hold up** | present | | point | | | | | vn support-15.3-1 «NP V NP»: agent=Pivot it=Theme | 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. **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:008-balance-the-centre-of-gravity.lesson:0`. **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): R5-strong ×1, R8-pos-agree ×1. **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/). - ← previous: [Living with friction: oil, wheels and…, 18](https://md.mova.elamur.ai/free/en/corpora/school/physics/7-living-with-friction/18/) - next →: [Balance: the centre of gravity, 1](https://md.mova.elamur.ai/free/en/corpora/school/physics/8-balance-the-centre-of-gravity/1/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/physics/8-balance-the-centre-of-gravity/)