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Introduction

Force and Motion is one of the several volumes of the series Physics in 24 hours. It is specially written for students preparing for the HKDSE Physics Examination. The notes and examples in this book follow closely to the HKDSE Physics syllabus.^ Detailed explanations on difficult concepts are given in this book. Its point-form notes act as the quick revision tool for students. Two special features of this book are the multiple choice questions for checking study progress and mock examination questions designed for the topic 'Force and Motion'.

Contents

Topic 1 - Position and movement

1.1 Position, distance and displacement

1.2 Scalars and vectors

1.3 Speed and velocity

1.4 Acceleration

1.5 Linear motion

1.6 Acceleration due to gravity

Topic 2 - Force and motion

2.1 Newton’s First Law of motion

2.2 Newton’s Second Law of motion

2.3 Newton’s Third Law of motion

2.4 Mass and weight

2.5 Addition and resolution of forces

2.6 Moment of a force

Topic 3 - Projectile motion

3.1 General Projectile

3.2 Independence of horizontal and vertical motions

Topic 4 - Work, energy and power

4.1 Work

4.2 Kinetic energy

4.3 Potential energy

4.4 Law of conservation of energy in a closed system

4.5 Power

Topic 5 - Momentum

5.1 Linear momentum

5.2 Law of conservation of (linear) momentum

5.3 Collision experiment

5.4 Elastic and inelastic collisions

Topic 6 - Uniform circular motion

6.1 Angular velocity

6.2 Centripetal acceleration

6.3 Centripetal force

6.4 Experiment to demonstrate the formula for centripetal force

Topic 7 - Gravitation

7.1 Newton’s law of gravitation

7.2 Gravitational field and gravitational field strength

7.3 Gravitational field strength of the Earth

7.4 Field lines and field pattern

7.5 Velocity of an object (e.g. satellite) in a circular orbit

Supplementary documents

Corrigenda <applicable to the February 2013 print run>

Amendment Guide for 2016 HKDSE Fine-tune Syllabus <applicable to the February 2013 print run>

Corrigenda <applicable to the September 2018 print run>