# Chapter 8 Modelling in Mechanics

## 8.1 Constructing a Model

Mechanics deals with motion and the action of forces on objects. Mathematical models can be constructed to simulate real-life situations, but in many cases it is necessary to simplify the problem by making assumptions so that it can be described using equations or graphs in order to solve it. In this lesson you learn about Modelling in Mechanics Constructing a Model, Constructing a Model, Assumptions in a Model.

Chapter 8 Modelling in Mechanics

## 8.2 Modelling Assumptions

Modelling assumptions can simplify a problem and allow you to analyse a real-life situation using known mathematical techniques. You need to understand the significance of different modelling assumptions and how they affect the calculations in a particular problem. In this lesson you learn about Modelling in Mechanics Modelling Assumptions , modelling assumptions, pulley assumption, smooth and rough surfaces, assumptions for a lamina.

Chapter 8 Modelling in Mechanics

## 8.3 Quantities and Units

The International System of Units, (abbreviated SI from the French, Systeme international dâ€™unites) is the modern form of the metric system. These base SI units are most commonly used in mechanics. In this lesson you learn about modelling in mechanics quantities and units, quantities and units, convert units of measurement, relative unit sizes, convert area units, convert volume units.

Chapter 8 Modelling in Mechanics

## 8.4 Working with Vectors

Vector is a quantity which has both magnitude and direction. In this lesson you learn about modelling in mechanics - working with vectors , working with vectors, trigonometric functions applied for vectors, applying Pythagoras for magnitude and unit vectors.

Chapter 8 Modelling in Mechanics