---
title: Moving towards each other and moving apart — a lesson of Mova's school · trees and pragmatics
description: «Moving towards each other and moving apart», a lesson of the lessons course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: When two travellers move towards each other, the gap between them shrinks by both their speeds together every hour.
---

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# Moving towards each other and moving apart

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Lesson 163 of the lessons course of Mova's primary school: 3 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).

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- [0](https://md.mova.elamur.ai/free/en/corpora/school/lessons/163-meeting-and-moving-apart/0/) — When two travellers move towards each other, the gap between them shrinks by both their speeds together every hour.
- [1](https://md.mova.elamur.ai/free/en/corpora/school/lessons/163-meeting-and-moving-apart/1/) — Towns 450 km apart, cars at 70 and 80 km an hour: together they close 70 + 80 = 150 km an hour, so they meet after 450 / 150 = 3 hours.
- [2](https://md.mova.elamur.ai/free/en/corpora/school/lessons/163-meeting-and-moving-apart/2/) — When they start at one place and go in opposite directions, the gap grows by the sum of the speeds in the same way.

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