PPT besaran Dan satuan
Summary
TLDRThis educational video script focuses on the fundamentals of physics measurements, emphasizing the importance of units and their standards. It introduces the concept of base and derived units, explaining their application in the International System of Units (SI). The script also covers various unit systems like MKS and FPS, and delves into the significance of dimensions in physics. It teaches how to convert between units and use scientific notation, enhancing understanding and problem-solving skills in physics.
Takeaways
- 📏 The script discusses the importance of understanding the measurement of physical quantities and their units, distinguishing between standard (SI) and non-standard units.
- 🌐 It emphasizes the international standard units, such as meters (m), kilograms (kg), and seconds (s), which are universally accepted for consistency.
- 📚 The script introduces the concept of base and derived units in physics, with base units being fundamental like length, mass, and time, and derived units being calculated from these.
- 🔢 It lists the seven base physical quantities recognized internationally: length (meter), mass (kilogram), time (second), thermodynamic temperature (Kelvin), electric current (ampere), luminous intensity (candela), and amount of substance (mole).
- 📊 The script explains the concept of dimensions, which describe how a physical quantity is composed of combinations of base quantities.
- 🔄 It covers unit systems, including the International System (SI), metric system, and the British Imperial system, highlighting the SI as the most widely used.
- 📘 The script provides examples of derived units, such as area (m²), pressure (N/m²), and velocity (m/s), and explains how they are derived from base units.
- 🧮 It teaches how to analyze the correctness of equations using dimensional analysis, ensuring that the dimensions on both sides of an equation are consistent.
- 🔄 The script introduces the concept of conversion factors, which are ratios used to convert one unit to another, such as 1 yard equals 0.9144 meters.
- 📘 It also covers scientific notation as a method to simplify the writing of very large or very small numbers, using powers of ten.
Q & A
What are the two types of units mentioned in the script for measuring physical quantities?
-The script mentions two types of units: base units and derived units. Base units are internationally recognized units such as meter (m), kilogram (kg), and second (s). Derived units are those that are defined in terms of base units.
What are the seven base quantities in the International System of Units (SI)?
-The seven base quantities in the International System of Units (SI) are length, mass, time, thermodynamic temperature, electric current, luminous intensity, and amount of substance.
What is the base unit for length in the International System of Units?
-The base unit for length in the International System of Units is the meter, symbolized as 'm'.
What is the base unit for mass in the International System of Units?
-The base unit for mass in the International System of Units is the kilogram, symbolized as 'kg'.
What is the base unit for time in the International System of Units?
-The base unit for time in the International System of Units is the second, symbolized as 's'.
What is the significance of derived units in physics?
-Derived units are significant in physics as they are defined by their relation to the base units and are used to express physical quantities that are not directly measurable in terms of base units.
What is the concept of dimensions in physics as discussed in the script?
-Dimensions in physics refer to the powers of base quantities that a physical quantity is composed of. It helps in understanding the relationships between different physical quantities and their units.
How can the concept of dimensions be used to analyze the validity of a physical equation?
-The concept of dimensions can be used to analyze the validity of a physical equation by ensuring that the dimensions on both sides of the equation are consistent, which is a check for the equation's dimensional homogeneity.
What is the purpose of scientific notation as mentioned in the script?
-Scientific notation, as mentioned in the script, is used to simplify the writing of very large or very small numbers by expressing them as a product of a number between 1 and 10 and a power of 10.
What is the significance of conversion factors in the context of different unit systems?
-Conversion factors are significant as they allow the conversion of physical quantities from one unit to another, which is essential for understanding and comparing measurements across different unit systems.
Why is it important to understand the difference between base and derived units in physics education?
-Understanding the difference between base and derived units is important in physics education because it provides a foundational understanding of the SI system, which is crucial for accurate scientific measurements and calculations.
Outlines
📏 Introduction to Basic Physics Quantities and Units
This paragraph introduces the concept of physical quantities and units, emphasizing the importance of measurement and expression through numbers. It distinguishes between base units, which are internationally recognized and constant, and non-base units, which may vary by region. The paragraph explains that base units are standardized internationally, such as the meter, kilogram, and second (MKS), while non-base units like Depa, Asta, and Jengkal are specific to countries like Indonesia. The focus is on the need for units to be internationally recognized, constant, and easily reproducible. It also outlines the seven base quantities in physics, including length, mass, time, temperature, electric current, luminous intensity, and amount of substance, each with its respective unit and symbol.
🔍 Derivative Quantities and Dimensional Analysis
The second paragraph delves into derivative quantities, which are derived from base quantities and can be calculated using their respective units. It introduces the concept of dimensions, explaining that they describe how a physical quantity is composed of base quantities. The paragraph provides examples of how to determine the dimensions of various physical quantities, such as mass, length, time, temperature, electric current, and luminous intensity. It also discusses the importance of understanding dimensions for learning about units and for verifying the correctness of equations through dimensional analysis. An example is given where the formula for power (P = force × velocity) is analyzed to ensure that the dimensions on both sides of the equation are consistent.
🔢 Scientific Notation and Unit Conversion
The final paragraph discusses scientific notation as a method to simplify the writing of large or small numbers, which is crucial for solving problems in physics. It provides examples of how to express astronomical distances and atomic sizes using powers of ten. The paragraph also emphasizes the importance of unit conversion, listing various conversion factors between different units of length, mass, time, and volume. It highlights the need to understand these conversions for problem-solving and encourages practice with provided examples to enhance understanding. The summary concludes with an invitation for feedback and a prompt for viewers to like and share for further content.
Mindmap
Keywords
💡Measurement
💡Units
💡Base Units
💡Derived Units
💡International System of Units (SI)
💡Dimensions
💡Conversion Factors
💡Scientific Notation
💡Dimensional Analysis
💡Physical Quantities
Highlights
Introduction to the importance of learning physics and the continuation of the lecture.
Definition of physical quantities and units, distinguishing between base and derived units.
Explanation of base units in the International System of Units (SI), including meter, kilogram, and second.
Discussion on non-SI units and their use in certain regions, such as Indonesia.
Criteria for units, emphasizing international standardization and ease of replication.
Introduction to the seven base physical quantities recognized internationally.
Listing of the seven base quantities and their respective SI units.
Overview of different unit systems, including MKS, CGS, FPS, and British engineering systems.
Emphasis on the international use of the MKS system for its simplicity and standardization.
Introduction to derived quantities and how they are defined through relationships with base quantities.
Examples of derived units and their relationships to base units, such as newton and joule.
Explanation of dimensions and how they relate to the composition of base quantities.
Demonstration of how to determine the dimensions of a physical quantity, using pressure as an example.
The significance of understanding dimensions for learning about physical quantities and their units.
Introduction to the concept of dimensional analysis for verifying the correctness of equations.
Example of using dimensional analysis to validate the equation for power in terms of force and velocity.
Explanation of unit conversion and the concept of conversion factors.
Examples of conversion factors between different units, such as yards to meters and kilograms to grams.
Importance of scientific notation for solving problems and expressing large or small numbers.
Instructions on how to write numbers in scientific notation and its application in physics.
Encouragement for students to practice problems to enhance their understanding of physical quantities and units.
Transcripts
selamat berjumpa kembali adik-adik yang
gemar belajar Fisika berjumpa kembali
sama mudah-mudahan P jumpa dalam keadaan
sehat asalamualaikum warahmatullahi
wabarakatuh salam sejahtera untuk kita
semua Om Swastiastu namikan k ini P
ingin melanjutkan
pengbasan besaran dan
satwa Ayo tetap S
belajar selamat menyimak penjelasan
Mari adik-adik kita lanjutkan yang
pertama yaitu besaran dan satuan besaran
adalah sesuatu yang dapat diukur dan
dapat dinyatakan dengan angka sedangkan
satuan sesuatu yang digunakan untuk
menyanakan ukuran besaran nah satuan itu
ada satuan baku ada satuan tidak baku
satuan baku iniah satuan yang berlaku
secara
internasionalat yang ada satuan meter kg
SK
ada satuan S meter gram SK Nah itu
termasuk satuan baku sedangkan yang
tidak baku satuan yang tidak berlaku
secara internasional seperti di
Indonesia ada satuan Depa Asta dan
jengkal nah syarat daripada satuan yaitu
bersifat secara
internasional bersifat tetap
kemudian mudah ditiru Mari kita simak
penjelasan
berikutnya Mari adik-adik lanjutkan
besaran pokok dan satuannya besaran
pokok besaran fisika yang hanya dapat
difinisikan melalui penggambaran
bagaimana kita mengukurnya sehingga
besaran tersebut dapat Berdi sendiri
tanpa menurunkannya dari besaran-besaran
lainnya besaran pokok serta satuannya
diterapkan berdasarkan pertimbangan
sebagai berikut yang pertama bersifat
internasional bersifat tetap mudah
ditiru oleh semua orang yang
memerlukannya seperti dijelaskan di atas
tadi Mari kita simak penjelasan
berikutnya Selamat Mari lanjutkan yaitu
tujuh besaran
pokok yang berlaku secara internasional
yang pertama hati-hati di sini ada
namanya besaran ada satuan adalah
lambang ya tabel berikut nah yang paling
kiri itu adalah besaran yang tengah
adalah satuan yang kanan lambang satuan
yang pertama tujuh besisan pokok yang
pertama yaitu panjang satuan meter
lamangnya m yang kedua massa satuan
kilogram lambangnya kg waktu satuan
sekon lambangnya S 4 suhu satuannya
Kelvin l satuannya k 5 5 kuat arus
satuannya amper lambangnya a en Inas
cahaya satuannya kandela lambangnya CD 7
jumlah sat suatnya mol Lang satuannya
mol nah ini sangat penting sebagai dasar
dalam belajar
Fisika Mari kita simak materi berikutnya
selamat men adad kita lihat sekelah
sistem satuan lihat yang skemanya sistem
satuan ada yang ke bawah sistem
internasional yaitu sing s dengan MKS
meter k
se yang atas ada sistem CS C met gram
scon ada juga sistem yang kanan yaitu
sistem Inggris Absolute yaitu FPS kit
bonscon yang kiri yaitual system British
engineering menggunakan kit sction Slug
Nah itulah jadi beberapa sistem satuan
tetapi secara interasional menggunakan
sistem MKS yaitu meter kgam S Mari kita
simak materi berikutnya selamat menyimak
Mari adik-adik kita lanjutkan besaran
turunan besaran turunan adalah besaran
yang dapat diturunkan atau diperoleh
dari besaran-besaran PO setelah kita
pelajari tadi satuan dari besaran
turunan juga dijabarkan melalui satuanan
dari besaran terkait seperti yang
pertama luas met
[Musik]
pers peratan
sat satuannya kilogram meter per ku =
newon 5 masih jenis satuannya
kogam/m³ 6 kecepatan meter pers 7
tekanan satuan Newton per m per 8 usaha
satuan newm = Joule 9 daya satuannya
Joule pers jadi begitu Adik besaran
turunan satuannya terdiri dari
beberapa satuan dari besaran pokok ini
penting dipelajari mempermudah nanti
belajar tentang dimensi Mari kita simak
materi berikutnya
Selamat Mari adikad lanjutkan dimensi
besaran sebelumnya kitaajari yaitu
besaran pokok dan besaran turunan
dimensi suatu besaran menggambarkan
bagaimana bes tersebutersusun atas
kombinasi besaran-besaran pokok jadi
dengan nanti belajar satuan dari besaran
pokok untuk mempermudah belajar tentang
dimensi seperti lihat yang berak besaran
dan yang satuan yang di kanan dimensinya
perhatikan tabelan berikut massa satuan
kilogram dimensinya m panjang
satuannya meter dimensinya l waktu
satuannya sekon dimensinya t suhu
satuannya Kelvin dimensinya Teta buat
arus satuannya ampere dimensinya X
cahaya Satya kandela dimensinya
j m dimensinya n secara umum nanti
dimensiuliskan bahwa m
tinggal nanti melihat Apakah di sana ada
unsura panjang waktu suhu kuat arus
initas cahaya jumlah dan pangkatnya
berapa Mari kita simat materi berikutnya
selamatanjutkan Melat Conto berikut ja
di m dimens massa l dimensi panjang dan
t dimensi waktu maka dimensi tekanan
adalah Nah tinggal milih yang mana Nah
ingat tadi tekanan rumusnya adalah gaya
pers satuan luas satuannya newton/ m²
ingat tadi Newton itulah kogram
m/s^ dan luas 1 M pers nah m-nya dicoret
sehingga nanti satuannya dari pteekanan
yaitu
kilogram
per
Mets k ya Nah semuanya
ditampilkan di atas
sehingga dimensi darip pada kanan
menjadi M L
-1 T -2 jadi jawabannya adalah e jadi
begitu adikadik untuk belajar
dimensi yang penting memahami satuan
daripada besaran tersebut Mari kita
simak materi berikutnya selamat
Mari adik-adik kita lanjutkan yaitu
analisis dimensi salah satu manfaat dari
konsep dimensi adalah untuk menganalisis
benar atau salahnya suatu persamaan
seperti daya itu adalah gaya kali
kecepatan lihat yang kanan atas dimensi
daya P = ml^ t-3 dimensi gaya F ml^ t-2
sedangkan dimensi
kecepatan
lt-1 pada su persamaan dimensi besaran
di ruas kiri harus sama dengan dimensi
besaran di ruas kanan lihat yang kanan
bawah daya sama gaya kali kecepatan Nah
Lihat rumusnya yang atas tadi dimensi
daya yaitu ml^ t-3 sedangkan gaya ML t
-2 * LT -1 Sederhanakan ml^ t -3 sama di
sebelah kanan ml^ t -3 jadi
ruas kiri dan kanan dimensinya sama jadi
gitulah
carauktikan apakah suatu persamaan itu
benar
atau kiri dan kanan
diensinya kita mati
berikut Mar adad lanjutkan konv
[Musik]
satuaj besaran ke besaran yang lain
konvensi satuan dapat ditulis sebagai
rasio atau perbandingan dua besaran
sehingga sama dengan 1 rasio ini disebut
faktor konversi lihat contoh di bawah 1
yard = 0,144 M 1 kg 1000 GR 1 menit 60
detik 1 jam 60 menit 1 km 1000 M 1 m 100
cm ada lagi yang
penting ingat waktu di SMP 1 cm³ = 1 cc
1 cc = 1 ml Nah ada juga yang perlu
dipahami yang paling bawah yaitu
1m³ = 1 l Nah itu penting sekali nanti
harus bisa
mengkoresi
dari satuan satu ke satuan yang lain
dalam menilaikan soal-soal Mari kita
simak Mater berikutnya
Samat baik ad lanjutkan yaitu notasi
ilmiah ini juga sangat penting dalam
memudahkan menyelesaikan
soal-soal dalam sik radius ratar
matahari misalkan
696 juta M radius atom hidrogen
0,0053 m untuk mengatasi masalah
susunlah secara penulisan bilangan
secara ilmiah yang disebut notasi ilmiah
dalam notasi ilmiah kita menuliskan
bilangan sebagai hasil kali bilangan
a yang terletak antara
satu 10 dengan bilangan 10 berpangkat
yang disebut dengan orde
sehingga yang di atas tadi jari-jari
radius Matahari Bisa dituliskan yaitu
6,96 10^8 m sedang radius atom hidrogen
bisa dituliskan 5,3 * 10^ -11 m jadi
begitu adikadik untuk memudahkan
menilikan soal dinyatakan dalam
kelipatan 10 jadi begitu Adik yang bisa
saya berikan tentang besaran satuan
silakan mencobaoba soal berikut untuk
meningkat pemahaman jangan lupa like
komen SH danp untuk motivasi saya
menyusun materi berikutnya sampai jumpa
pada materi berikutnya
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