Page 29 - Physics

Introduction to Physics

a fl uid, such as water or air. The principle pressure is transmitted undiminished to
states that “Any object partially or totally all parts of the fl uid and to the walls of
immersed in a fl uid experiences an upthrust the container”.
which is equal to the weight of the fl uid
displaced by the object”. Archimedes’ The principle of conservation of energy
principle helps to understand why objects The principle of conservation of energy
fl oat or sink and has a practical application emphasises that the total energy in a

in various engineering and everyday system is conserved. This principle
scenarios. allows us to analyse complex systems,
predict their behaviour, and understand

Pascal’s principle how energy fl ows and transforms,
Pascal’s principle accounts for the providing a fundamental framework for
transmission of pressure in fl uid. Pascal’s understanding the physical world. The
principle states that “When pressure is principle states that ‘Energy can neither
applied at any point on the surface of a be created nor destroyed but it can be
fl uid contained in a closed container, the transformed from one form to another’

ICT corner

To build scientifi c literacy use simulations or visit (SGR) https://phet.
colorado.edu select the simulation titled pendulum lab and simulation
titled curve fi tting, to help students collect data, drawing graph and
choose the best line of fi t.

Chapter summary
1. Physics is the study of the relationship between matter and energy.
2. People who study and work professionally in the fi eld of physics are known as
physicists.

3. Physicists use results from experiments to develop scientifi c laws that are normally
expressed in the language of mathematics.

4. Physics is regarded as the ‘fundamental’ of natural sciences and it is related to
other subjects. These subjects include, chemistry, biology, and mathematics.
5. Physics is applied in many areas of our lives. Some of the areas where it is evident
are homes, hospitals, schools, communication, transport and industry.
6. Physics is important since it explains the behaviour of the universe while answering
many questions. It is also important in:

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