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title: Reasoning about the body moving in the world — a lesson of Mova's school · trees and pragmatics
description: «Reasoning about the body moving in the world», a lesson of the everyday course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Two simple ideas explain a lot of everyday moving: gravity always pulls straight down, and a moving body keeps moving until 
---

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# Reasoning about the body moving in the world

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Lesson 10 of the everyday course of Mova's primary school: 21 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/everyday/10-reasoning-about-the-moving-body/).

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- [0](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/0/) — Two simple ideas explain a lot of everyday moving: gravity always pulls straight down, and a moving body keeps moving until something stops it.
- [1](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/1/) — You stay up when your centre of gravity is above your feet; on a slope you lean forward going up and keep your knees bent and your steps small going down, so your weight stays over your feet even though the ground is tilted.
- [2](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/2/) — Grip (friction) between your shoes and the ground is what lets you push, turn and stop; ice has a very thin, slippery wet layer on top, so there is little grip, and you walk on it like a penguin: small flat steps, weight over your front foot, hands out of your pockets.
- [3](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/3/) — Because a moving body keeps moving, when a bus brakes you lurch forward, and if you jump off a swing while it is moving you fly on at its speed and land badly, while the empty seat swings back towards you.
- [4](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/4/) — Stopping slowly is gentler than stopping suddenly, which is why bent knees, sand, mats and helmet foam soften a landing: a girl in Edinburgh jumping into a sandpit lands softly because the sand lets her slow down over a longer time.
- [5](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/5/) — A boy in Texas jumped off a high garage roof into a pile of leaves, thinking they were soft; the leaves were thin, he hit the hard ground and broke both ankles.
- [6](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/6/) — A girl in Melbourne ran full speed round a corner at school and crashed into another child; both hit their heads, and one needed stitches.
- [7](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/7/) — Gravity always pulls straight down, towards the centre of the Earth, even on a slope.
- [8](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/8/) — You stay balanced when your centre of gravity is above your feet.
- [9](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/9/) — Walking uphill, people lean forward to keep their weight over their feet.
- [10](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/10/) — A moving body keeps moving until something slows it down or stops it.
- [11](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/11/) — When a bus or car brakes suddenly, the people inside lurch forward.
- [12](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/12/) — Friction is the grip between two surfaces that stops them sliding easily.
- [13](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/13/) — The surface of ice has a very thin, slippery layer, so shoes have little grip on it.
- [14](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/14/) — On ice, small flat steps with your weight over your feet help stop a fall.
- [15](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/15/) — Grit or sand sprinkled on an icy path gives shoes more grip.
- [16](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/16/) — Stopping over a longer time makes a landing or a bump gentler.
- [17](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/17/) — Sand, mats and the foam in a helmet soften a blow by letting you stop more slowly.
- [18](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/18/) — Cyclists lean into a bend so they do not fall outwards.
- [19](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/19/) — Carrying a heavy bag in one hand makes you lean the other way to stay balanced.
- [21](https://md.mova.elamur.ai/free/en/corpora/school/everyday/10-reasoning-about-the-moving-body/21/) — Landing from a big height on straight legs can break ankles, legs or the spine.

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- ← previous: [Tiredness, hunger and thirst: the body's signals](https://md.mova.elamur.ai/free/en/corpora/school/everyday/9-body-signals/)
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