--- title: Why do skilled riders sit back on steep downhill slopes? — Riding a bike: why it stays up · tree and pragmatics description: Why do skilled riders sit back on steep downhill slopes? Test 10 · ★★ of lesson 9 «Riding a bike: why it stays up» of the physics course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/physics/9-riding-a-bike/t10/) [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/) / [Physics](https://md.mova.elamur.ai/free/en/corpora/questions/physics/) / [Riding a bike: why it stays up](https://md.mova.elamur.ai/free/en/corpora/questions/physics/9-riding-a-bike/) / t10 # Test 10 · ★★ · Riding a bike: why it stays up Why do skilled riders sit back on steep downhill slopes? **Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** skilled riders · **What happens:** do, sit back · **To what, where:** steep downhill slopes This is test 10 · ★★ of lesson 9 «Riding a bike: why it stays up» 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/9-riding-a-bike/#t10). ## The question {#question} ```conllu # sent_id = question:physics:9-riding-a-bike:t10:1 # text = Why do skilled riders sit back on steep downhill slopes? 1 Why why ADV WRB PronType=Int 2 advmod _ _ 2 do do VERB VBP Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin 5 advcl _ _ 3 skilled skilled ADJ JJ Degree=Pos 4 amod _ _ 4 riders rider NOUN NNS Number=Plur 5 nsubj _ _ 5 sit sit VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 6 back back ADV RB _ 5 advmod _ _ 7 on on ADP IN _ 10 case _ _ 8 steep steep ADJ JJ Degree=Pos 10 amod _ _ 9 downhill downhill ADJ JJ Degree=Pos 10 amod _ _ 10 slopes slope NOUN NNS Number=Plur 5 obl _ SpaceAfter=No 11 ? ? PUNCT . _ 5 punct _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **do** | present | skilled riders *not said here* | | | | | | vn act-114-1 «NP V»: agent=Agent | | 2 | **sit back** | present | skilled riders | | | steep downhill slopes | | | vn assuming\_position-50 «NP V PP.location»: agent=Agent on slope=Location | 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} It makes the brakes cooler ```conllu # sent_id = question:physics:9-riding-a-bike:t10:o1:1 # text = It makes the brakes cooler 1 It it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 2 nsubj _ _ 2 makes make VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 3 the the DET DT Definite=Def|PronType=Art 4 det _ _ 4 brakes brake NOUN NNS Number=Plur 2 obj _ _ 5 cooler cool ADJ JJR Degree=Cmp 2 xcomp _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **make** | present | It | the brakes | | | | cool *property* | vn build-26.1-1 «NP.material V NP»: agent=Material brake=Product | ### Option 2 · ✓ the right answer {#o2} It keeps their weight from tipping over the front ```conllu # sent_id = question:physics:9-riding-a-bike:t10:o2:1 # text = It keeps their weight from tipping over the front 1 It it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 2 nsubj _ _ 2 keeps keep VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 3 their their PRON PRP$ Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs 4 nmod:poss _ _ 4 weight weight NOUN NN Number=Sing 2 obj _ _ 5 from from SCONJ IN _ 6 mark _ _ 6 tipping tip VERB VBG Tense=Pres|VerbForm=Ger 2 advcl _ _ 7 over over ADP IN _ 9 case _ _ 8 the the DET DT Definite=Def|PronType=Art 9 det _ _ 9 front front NOUN NN Number=Sing 6 obl _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **keep** | present | It | their weight | | | | | vn keep-15.2 «NP V NP»: agent=Agent weight=Theme | | 2 | **tip** | gerund | | | | the front | | | vn throw-17.1-1-1 «NP V NP PP.destinations»: agent=Agent over front=Destination | ### Option 3 {#o3} It makes them faster ```conllu # sent_id = question:physics:9-riding-a-bike:t10:o3:1 # text = It makes them faster 1 It it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 2 nsubj _ _ 2 makes make VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 3 them they PRON PRP Case=Acc|Number=Plur|Person=3|PronType=Prs 2 obj _ _ 4 faster fast ADJ JJR Degree=Cmp 2 xcomp _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **make** | present | It | them *= they* | | | | fast *property* | vn build-26.1-1 «NP.material V NP»: agent=Material they=Product | ### Option 4 {#o4} It makes the hill less steep ```conllu # sent_id = question:physics:9-riding-a-bike:t10:o4:1 # text = It makes the hill less steep 1 It it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 2 nsubj _ _ 2 makes make VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 3 the the DET DT Definite=Def|PronType=Art 4 det _ _ 4 hill hill NOUN NN Number=Sing 2 obj _ _ 5 less less ADV RBR Degree=Cmp 6 advmod _ _ 6 steep steep ADJ JJ Degree=Pos 2 xcomp _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **make** | present | It | the hill | | | | steep *property* | vn build-26.1-1 «NP.material V NP»: agent=Material hill=Product | **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. - ← previous: [Riding a bike: why it stays up, test 9](https://md.mova.elamur.ai/free/en/corpora/questions/physics/9-riding-a-bike/t9/) - next →: [Riding a bike: why it stays up, test 11](https://md.mova.elamur.ai/free/en/corpora/questions/physics/9-riding-a-bike/t11/) - ↑ back to [Riding a bike: why it stays up](https://md.mova.elamur.ai/free/en/corpora/questions/physics/9-riding-a-bike/)