--- title: Balance a ruler on one finger and it stays only when your finger is… — Balance: the centre of gravity · tree and pragmatics description: Balance a ruler on one finger and it stays only when your finger is under its middle; stick clay on one end and the balancing point moves towards the clay. Who acts: you, ruler, finger, balancing point. A sentence of the lesson «Balance: the centre of gravity» of the physics course of Mova's primary --- [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/1/) [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/) / 1 # Balance: the centre of gravity, sentence 1 Balance a ruler on one finger and it stays only when your finger is under its middle; stick clay on one end and the balancing point moves towards the clay. **Who acts:** you, ruler, finger, balancing point · **What happens:** balance, stay, be, stick, move · **To what, where:** ruler, one finger, middle, clay, one end 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 (you, ruler, finger, balancing 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:1 # text = Balance a ruler on one finger and it stays only when your finger is under its middle; stick clay on one end and the balancing point moves towards the clay. # 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): R2-punct-next ×1, R5-strong ×1, R7-rel-agree ×3 1 Balance balance VERB VB Mood=Imp|VerbForm=Fin 0 root _ _ 2 a a DET DT Definite=Ind|PronType=Art 3 det _ _ 3 ruler ruler NOUN NN Number=Sing 1 obj _ _ 4 on on ADP IN _ 6 case _ _ 5 one one NUM CD NumForm=Word|NumType=Card 6 nummod _ _ 6 finger finger NOUN NN Number=Sing 1 obl _ _ 7 and and CCONJ CC _ 9 cc _ _ 8 it it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 9 nsubj _ _ 9 stays stay VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 1 conj _ _ 10 only only ADV RB _ 17 advmod _ _ 11 when when ADV WRB _ 17 advmod _ _ 12 your your PRON PRP$ Case=Gen|Person=2|Poss=Yes|PronType=Prs 13 nmod:poss _ _ 13 finger finger NOUN NN Number=Sing 17 nsubj _ _ 14 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 17 cop _ _ 15 under under ADP IN _ 17 case _ _ 16 its its PRON PRP$ Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs 17 nmod:poss _ _ 17 middle middle NOUN NN Number=Sing 9 advcl _ _ 18 ; ; PUNCT : _ 19 punct _ Agree=R2-punct-next|Haiku=1:punct 19 stick stick VERB VB Mood=Imp|VerbForm=Fin 1 parataxis _ Agree=R7-rel-agree|Haiku=1:conj 20 clay clay NOUN NN Number=Sing 19 obj _ _ 21 on on ADP IN _ 23 case _ _ 22 one one NUM CD NumForm=Word|NumType=Card 23 nummod _ _ 23 end end NOUN NN Number=Sing 19 obl _ _ 24 and and CCONJ CC _ 28 cc _ _ 25 the the DET DT Definite=Def|PronType=Art 27 det _ Agree=R5-strong|Haiku=28:det 26 balancing balance NOUN NN Number=Sing 27 compound _ Agree=R7-rel-agree|Haiku=27:amod|HaikuPos=VERB:VBG:VerbForm=Ger 27 point point NOUN NN Number=Sing 28 nsubj _ _ 28 moves move VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 19 conj _ _ 29 towards towards ADP IN _ 31 case _ _ 30 the the DET DT Definite=Def|PronType=Art 31 det _ _ 31 clay clay NOUN NN Number=Sing 28 obl _ Agree=R7-rel-agree|Haiku=28:nmod 32 . . PUNCT . _ 1 punct _ _ ``` ## Pragmatics {#pragmatics} - form: command - act: request - voice: narrator - polarity: none - teacher: kept the draft | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **balance** | imperative | you *not said here* | a ruler | | one finger | | | vn spatial\_configuration-47.6-1 «NP V NP.theme PP»: agent=Agent ruler=Theme on finger=Location | | 2 | **stay** | present | ruler | | | | | | vn exist-47.1 «NP V»: agent=Theme | | 3 | **is** | present | your finger | | | finger's middle | | | tree rules | | 4 | **stick** | infinitive | | clay | | | on one end | | vn spray-9.7-1 «NP V NP PP.destination»: agent=Agent clay=Theme on end=Destination | | 5 | **move** | present | the balancing point | | | the clay | | | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme towards clay=Trajectory | 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:1`. **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): R2-punct-next ×1, R5-strong ×1, R7-rel-agree ×3. **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: [Balance: the centre of gravity, 0](https://md.mova.elamur.ai/free/en/corpora/school/physics/8-balance-the-centre-of-gravity/0/) - next →: [Balance: the centre of gravity, 3](https://md.mova.elamur.ai/free/en/corpora/school/physics/8-balance-the-centre-of-gravity/3/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/physics/8-balance-the-centre-of-gravity/)