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PHYSICS IS FUN

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SOME BASIC RULES… 

BE PUNCTUAL

PAY ATTENTION & BE ALERT

HAVE YOUR BOOKS & WRITING

UTENSILS WITH YOU AT ALLTIMES

HAND IN ALL TASKS/HOMEWORKON TIME

 ASK LOTS OF QUESTIONS & BECURIOUS

USE ENGLISH , PLEASE… 

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WHAT BOOKS?

TEXT BOOK

PRACTICAL BOOK

NOTE BOOK PRACTICE BOOK

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INTRODUCTION TO

PHYSICS

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Think, Pair, ShareIntroduction, Engagement, recognising prior knowledge

What physics (science) did you

experience in your life this

morning before coming to this

class? Think about your ideas

Discuss with another person in your 

group Share with the rest of the group

Report back one example from your 

group

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What is the scientific processyou need to go through?

POE

•P = Predict

•O = Observe

•E = Explain

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What is Physics

The study of naturalphenomena

eg lightning , sea waves ,thunder ,… 

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FIELD OF STUDY INPHYSICS

• WORK IN GROUPS OF THREE ORFOUR

• PLACE THE CARDS GIVEN TO YOU

FACE DOWN ON THE TABLE• TAKE TURNS TO PICK A CARD AT

RANDOM (PICK ONE ONLY WHEN IT

IS YOUR TURN)• EXPLAIN YOUR IDEAS TO YOUR

GROUP 

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ELECTROMAGNETISM

ELECTRICITY

HEAT

LIGHT

FORCES AND MOTION

NUCLEAR PHYSICS

WAVES

ELECTRONICS

FIELDS OF STUDY

IN PHYSICS

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INTRODUCTION TOPHYSICS

• UNDERSTANDING PHYSICS

• PHYSICAL QUANTITIES• MEASUREMENT

• SCIENTIFIC INVESTIGATIONS

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PHYSICAL QUANTITIES

• Quantities that can be measured

• Express in units : SI units (SystemInternational Unit)

• Represent the quantity by a symbol,a numerical value for themagnitude and the unit 

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PHYSICAL QUANTITIES

Two types of Physical Quantities

1.Base Quantities

2.Derived Quantities

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Base Quantities

• Physical Quantities that cannot bedefined in terms of other quantities

• the simplest form

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Symbolfor SI unit

SI unitSymbolBasequantity

mmeterl Length

kgkilogrammmass

ssecondttime

KkelvinTTemperature

AampereI Electriccurrent

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Derived Quantities

• Physical quantities derived fromcombinations of base quantitieseither by multiplication or division or

both

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Examples

Derivedquantity

Symbol Relationshipwith basequantities

Derivedunits

Area A length xlength

m2 

volume V length xlength xlength

m3 

speed v  distance

time

ms-1 

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Let’s try … 

It was already 8.00 am when she woke up.The temperature was at 30 oC. Shequickly got dressed and started to walk to

the library which was 1500 m away. Ittook her 40 minutes. She took along her 3kg bag , in which she placed a 2000 mlbottle of mineral water, books weighing 5

N and a 2 m2 piece of mat .

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• From the description above, identifythe physical quantities. Then classifythem into base and derived

quantities.

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Base quantity

• time

• mass

• length/distance

• temperature

Derived quantity

• area

• weight

• volume

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Standard Form

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• A green light of wavelength of 0.00000051 m travels at a speed of 300 000 000 ms-1.

How do we simplified the numbers?

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Expressing in standard form

• Scientific notation

• Based on powers of the base number10

A x 10n 

• Where 1 ≤ A <10 , A is either an

integer or decimal number• n is a positive integer

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• Using the standard form

• Wavelength of light

= 0.00000051 m= 5.1 x 10-7 m

• Speed of light = 300 000 000 ms-1

= 3.0 x 108

m s-1

 

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PREFIXES

• Used to express some physicalquantities that are too large or toosmall

• A letter placed at the beginning tomodify the meaning

• eg 1500 m

1.5 km

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Prefix Symbol Value

tera- T 1012 

giga- G 109 

mega- M 106 

kilo- k 103 

deka- da 10 

deci- d 10-1 

centi- c 10-2 

milli- m 10-3 

micro-  μ  10-6 

nano- n 10-9 

pico- p 10-12 

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Let’s try 

• Quantities are given as shown below

a. 0.0000061 m

b. 0.0042 s

c. 6750 000 000 kg

1. Write the following quantities in scientificnotation.

2. Express the quantities using the correctprefixes.

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• Next … 

Understanding Scalar and VectorQuantities