Page 7 - Physics

Introduction to Physics
Chapter One

I ntroduction to Physics

Introducti on

Physics is the fundamental branch of science that explores the principles
governing the behaviour of matter and energy in the universe. Physics deals
with very large objects like planets and very small ones like atoms. It also
covers various of concepts, theories and principles that provide insights
into the natural world and its interactions. In this chapter, you will learn the
concepts, theories and principles of Physics. The competencies developed will
enable you to apply the concepts, theories and principles of Physics to solve
daily life problems. You will also be able to relate physics with other branches
of natural sciences.

Think
how our life could be without the interaction between matter and energy

Concept of Physics heated? To answer such questions, the

The universe is a totality of matter, applications of theories, principles and
energy, space, and time. The word laws of science are required.
universe originates from the Latin Physics falls under a broad category of
word ‘universus’ which means ‘all or natural science, which is divided into
everything’. It can therefore be referred three main branches, namely physics,
to as everything surrounding us; within, chemistry, and biology. Physics is the
near, far and beyond our planet, solar branch of science which deals with
system, and galaxy in which our solar the study of matter, energy and their
system belongs (the Milky Way Galaxy). interactions.
We are part of the universe. Science is the
major tool for studying and exploring the The word physics originated from the
universe. It begins with inquiries such as Greek word ‘Physikos’ which means
what is the universe? What is its origin? ‘nature’. Physics involves the study of
What makes up the universe? How does it physical and natural phenomena around
change with time? Why does the sky look us. Examples of these phenomena are the
blue? And why does iron turn red when occurrence of eclipses, causes of sunset

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