FISIKA KELAS X: GERAK LURUS (PART 1) Jarak, Perpindahan, Kelajuan, Kecepatan, Percepatan

Summary

In this educational video, Yusuf Ahmad introduces physics concepts for 10th-grade students, focusing on linear motion. He clarifies the difference between distance and displacement, explains the concepts of average speed and velocity, and delves into acceleration. The video also covers instantaneous velocity and acceleration, using derivatives from calculus to illustrate these concepts. An example is provided to calculate the average speed, velocity, and acceleration of an object moving from point A to C via point B. The script is designed to clarify these fundamental physics principles for better understanding.

Takeaways

• 📏 Distance and Displacement: The script clarifies the difference between distance, which is the total path traveled, and displacement, which is the shortest path from the starting point to the end point.
• 🚶‍♂️ Example of Calculation: It demonstrates how to calculate the total distance and displacement using an example where a person walks east and then turns south.
• 📐 Pythagorean Theorem: The script uses the Pythagorean theorem to find the displacement when the path is not a straight line.
• 🔢 Average Velocity and Speed: It explains that average velocity is the total distance traveled divided by the time taken, while average speed is the total displacement divided by the time taken.
• 🚗 Motion Example: The script provides an example involving an object moving from point A to point C via point B to illustrate the calculation of average velocity and speed.
• ⏱ Time and Velocity: It emphasizes the importance of time in calculating average velocity and speed, showing how to use the formula V = total distance / total time.
• 📉 Acceleration: The script introduces the concept of acceleration as the change in velocity over time, using the formula A = (Vf - Vi) / time.
• 🔄 Instantaneous Velocity and Acceleration: It distinguishes between average velocity/acceleration and instantaneous velocity/acceleration, explaining that the latter is the velocity or acceleration at a specific moment in time.
• 📚 Derivatives in Mathematics: The script briefly touches on the concept of derivatives in mathematics, which are used to find instantaneous rates of change, such as velocity and acceleration.
• 🔢 Derivative Examples: It provides examples of how to calculate derivatives for simple mathematical functions, which is foundational for understanding instantaneous velocity and acceleration.
• 📘 Understanding Motion: The script concludes by emphasizing the importance of understanding various concepts of motion, including distance, displacement, velocity, speed, and acceleration, for a comprehensive study of physics.

Q & A

What is the main topic of the video?

The main topic of the video is the study of straight-line motion in physics, specifically focusing on various concepts such as distance, displacement, average velocity, and acceleration.

What is the difference between 'jarak' and 'perpindahan' as mentioned in the video?

'Jarak' refers to the total path traveled, while 'perpindahan' is the shortest distance from the starting point to the final point, essentially the displacement.

Can you provide an example given in the video to illustrate the difference between 'jarak' and 'perpindahan'?

In the video, Andi walks 8 meters east and then turns and walks 6 meters south. The 'jarak' (total path) is 8 + 6 = 14 meters, while the 'perpindahan' (displacement) is the straight-line distance from the starting point to the final point, which can be calculated using the Pythagorean theorem as √(8² + 6²) = 10 meters.

What is the formula to calculate the average velocity mentioned in the video?

The formula to calculate the average velocity is given by V = X/Δt, where V is the average velocity, X is the total distance traveled, and Δt is the time taken.

How is average speed different from average velocity?

Average speed is the total distance traveled divided by the time taken, while average velocity is the displacement divided by the time taken. Average speed does not account for direction, whereas average velocity does.

What is the formula for calculating the average acceleration?

The formula for calculating average acceleration is a = Δv/Δt, where a is the acceleration, Δv is the change in velocity, and Δt is the change in time.

Can you explain the concept of instantaneous velocity and acceleration as discussed in the video?

Instantaneous velocity is the velocity of an object at a specific moment in time, while instantaneous acceleration is the rate of change of velocity at that specific moment. They are derived from the first and second derivatives of position with respect to time, respectively.

What mathematical concept is introduced in the video to help understand instantaneous velocity and acceleration?

The mathematical concept introduced is the derivative, which is used to find the rate of change of a function. In the context of motion, the first derivative of position with respect to time gives the velocity, and the second derivative gives the acceleration.

How is the derivative of a function calculated as per the examples given in the video?

The derivative of a function is calculated by finding the rate at which the function changes with respect to the variable. For example, if the function is y = ax^n, the derivative with respect to x is y' = n * ax^(n-1).

What is the significance of the derivative in physics, especially in the context of motion?

In physics, the derivative is significant as it allows us to calculate rates of change, such as velocity from position and acceleration from velocity, providing insights into the behavior of objects in motion.

How does the video script conclude?

The video script concludes with a reminder for viewers to like, share, and subscribe if they found the video helpful, and a thank you note from the presenter, Yusuf Ahmad.

Outlines

00:00

📚 Introduction to Linear Motion Concepts

The script begins with an introduction to the topic of linear motion for a physics class, taught by Yusuf Ahmad. It clarifies the common misconception between 'distance' and 'displacement', emphasizing that distance is the total path traveled while displacement is the shortest path from the starting point to the endpoint. An example is given involving a person named Andi walking east and then south, calculating both the distance and displacement using the Pythagorean theorem. The explanation then moves on to discuss average velocity and speed, highlighting the difference between the two, where average velocity is the total distance divided by the time taken, and average speed is the total displacement divided by the time taken. A problem involving an object moving from point A to C via point B is presented to illustrate the calculation of average velocity and speed.

05:02

🔢 Calculating Average Velocity and Speed

This paragraph delves deeper into the calculation of average velocity and speed, providing a detailed example of an object's movement. The object travels from point A to B to C, with specified distances for each segment and a total time taken. The script explains how to find the total distance traveled and the total displacement, which are then used to calculate the average velocity and speed. The formula for average velocity is given as the total distance divided by the time, and for average speed, it is the total displacement divided by the time. The example concludes with the calculation of both the average velocity and speed for the object's journey.

10:05

🚗 Understanding Acceleration and Instantaneous Velocity

The script introduces the concept of acceleration, explaining it as the change in velocity over a specific time period. It provides a formula for average acceleration and an example of a car increasing its speed from 2 meters per second to 4 meters per second over 10 seconds, calculating the acceleration as 0.2 meters per second squared. The paragraph also touches on the mathematical concept of derivatives as a prerequisite for understanding instantaneous velocity and acceleration, giving a brief explanation of how to find the derivative of a function and providing examples of derivative calculations for different functions.

15:10

📚 Derivatives and Instantaneous Velocity/Acceleration

This paragraph focuses on the application of derivatives to find instantaneous velocity and acceleration. It explains that instantaneous velocity is the first derivative of position with respect to time, and acceleration is the second derivative of position or the first derivative of velocity with respect to time. The script provides a detailed example using a position function in terms of time and guides through the process of finding the velocity and acceleration functions by taking derivatives. It concludes with a specific example of finding the velocity and acceleration at a particular time instance.

📝 Conclusion and Call to Action

The final paragraph wraps up the lesson on linear motion by summarizing the key concepts covered in the video. It invites viewers to like, share, and subscribe if they found the content helpful. The teacher, Yusuf Ahmad, signs off with a thank you and a religious blessing, emphasizing the educational value of the video and encouraging continued learning.

Keywords

💡Uniform Linear Motion

Uniform linear motion refers to the movement of an object at a constant speed in a straight line. In the video script, this concept is foundational for understanding the basic principles of motion discussed. The script introduces the topic by explaining concepts related to straight-line motion, such as distance and displacement, which are integral to grasping the nature of uniform linear motion.

💡Distance

Distance is a measure of the total path length traveled by an object, regardless of the direction of motion. In the script, distance is differentiated from displacement, with examples illustrating how to calculate the total path length, such as when Andi walks 8 meters east and then 6 meters south, totaling a distance of 14 meters.

💡Displacement

Displacement is the straight-line distance from the starting point to the ending point of an object's motion. It is a vector quantity that considers direction. The script uses the example of Andi's walk to explain displacement, where the shortest path from the starting point to the final position is calculated using the Pythagorean theorem, resulting in a displacement of 10 meters.

💡Average Speed

Average speed is defined as the total distance traveled divided by the total time taken. The script explains the difference between average speed and average velocity, emphasizing that average speed is calculated using the total path length over a specific time period, as seen in the example where an object moves from point A to point C with various distances and time intervals involved.

💡Average Velocity

Average velocity is the total displacement divided by the total time. It is a vector quantity that considers both magnitude and direction. The script clarifies that average velocity is calculated using the shortest path (displacement) over time, contrasting it with average speed, and provides an example involving an object's movement from point A to point C.

💡Acceleration

Acceleration is the rate of change of velocity with respect to time. It indicates how quickly an object's speed is changing. The script introduces the concept of average acceleration, which is calculated as the change in velocity divided by the time over which the change occurred, using an example of a car increasing its speed from 2 m/s to 4 m/s over 10 seconds.

💡Instantaneous Speed

Instantaneous speed is the speed of an object at a specific moment in time. It is a measure of how fast an object is moving at a particular instant. The script differentiates between average speed and instantaneous speed, explaining that the latter pertains to the speed at a particular moment, such as at the first second of motion.

💡Instantaneous Acceleration

Instantaneous acceleration is the rate of change of velocity at a specific instant. It is the derivative of velocity with respect to time at a particular moment. The script explains that to find instantaneous acceleration, one would take the derivative of the velocity function with respect to time, as demonstrated in the mathematical examples provided.

💡Derivative

In the context of the script, a derivative represents the rate at which a function changes with respect to its variable. It is a fundamental concept in calculus and is used to find instantaneous rates of change, such as speed and acceleration. The script provides examples of how to calculate derivatives for various functions, which is crucial for understanding concepts like instantaneous speed and acceleration.

💡Position Function

A position function in physics describes the position of an object as a function of time. It is used to analyze motion and can be differentiated to find velocity and acceleration. The script uses the position function to derive expressions for velocity and acceleration, as seen in the example where the position function R = 4t^3 - 5t - 12 is differentiated to find the velocity and acceleration of an object.

💡Pythagorean Theorem

The Pythagorean theorem is a principle in geometry that states the square of the hypotenuse of a right-angled triangle is equal to the sum of the squares of the other two sides. The script uses this theorem to calculate displacement in a scenario where an object moves in two perpendicular directions, illustrating how the theorem applies to problems in physics.

Highlights

Introduction to physics concepts for class 10, focusing on straight-line motion.

Explanation of the difference between distance and displacement in motion.

Distance is the total path traveled, while displacement is the shortest path from start to end.

Example problem involving calculating distance and displacement for a person walking east and then south.

Use of the Pythagorean theorem to find displacement in a right-angled triangle scenario.

Clarification of the terms 'average speed' and 'average velocity', and their differences.

Average speed is the total distance traveled divided by the time taken, while average velocity is the displacement divided by time.

Example calculation of average speed and velocity for an object moving from point A to C via point B.

Introduction to the concept of 'acceleration' as the rate of change of velocity over time.

Calculation of acceleration using the formula a = Δv/Δt.

Example of calculating the acceleration of a car increasing its speed from 2 m/s to 4 m/s over 10 seconds.

Introduction to instantaneous velocity and acceleration, which are the rates at a specific moment in time.

Differentiation between average velocity and instantaneous velocity.

Explanation of how to calculate instantaneous velocity and acceleration using derivatives in mathematics.

Derivative of position with respect to time gives instantaneous velocity, and the second derivative gives acceleration.

Example of finding the velocity and acceleration equations from a given position-time function.

Concept of derivatives in calculus as applied to physics for understanding motion.

Final summary and call to action for viewers to like, share, and subscribe for more educational content.

Transcripts

[Musik]

Halo assalamualaikum warahmatullahi

wabarakatuh Halo sobat fisika jumpa lagi

dengan saya Yusuf Ahmad a pada video

kali ini kita akan belajar tentang

materi fisika kelas 10 yaitu tentang

gerak lurus nah pada materi gerak lurus

Ini nanti akan saya buat jadi beberapa

video ya untuk video kali ini yaitu

untuk yang 41 yaitu berkaitan dengan

besaran-besaran dalam gerak lurus Oke

Seperti apa yuk simak penjelasannya

berikut ini Oke sobat fisika kita mulai

dari yang pertama yaitu berkaitan dengan

jarak dan perpindahan Nah kadang-kadang

kita suka miskonsepsi ini kadang-kadang

kita suka menganggap bahwa jarak dan

perpindahan itu adalah besaran yang sama

Padahal jarak dan perpindahan itu

merupakan besaran yang berbeda nah jarak

sendiri itu merupakan total lintasan

yang ditempuh sedangkan perpindahan itu

jarak terpendek dari titik awal ke titik

akhir Oke sahabat fisika kita lihat

contohnya berikut ini contoh Andi

berjalan ke arah timur sejauh delapan

meter kemudian ia berbelok ke arah

selatan sejauh enam meter berapakah

jarak dan perpindahan yang telah

ditempuh oleh Hani nah ini disini Ani

pertama dia berjalan ke arah timur

sejauh delapan meter kemudian ia

berbelok ke selatan sejauh enam meter

dari sini kita bisa mencari jaraknya

ingat bahwa Jarak batu merupakan total

lintasan yang ditempuh jadi jarak yang

ditempuh oleh Andi yaitu = 8 ditambah

enam atau sama dengan 14 m Nah itu

jaraknya sedangkan perpindahannya ingat

perpindahan itu merupakan jarak

terpendek

Hai dari titik awal ke titik akhir lalu

Bagaimana cara mencari perpindahannya

Nah untuk mencari perpindahannya cukup

kita tarik garis lurus dari titik awal

ke titik akhirnya kita seperti ini

misalnya perpindahannya kita anggap

adalah x jadi perpindahannya itu = X Nah

untuk mencari X sebagaimana karena kalau

kita lihat disini bentuknya jelas

segitiga siku-siku jadi untuk mencari

action bisa nih kita gunakan teorema

Pythagoras talk x-nya berarti = akar 8

kuadrat ditambah enam kuadrat yang

nilainya sama dengan berapa mi se 10 m

Nah jadi bedakan antara jarak dan

perpindahannya Oke Oke next berikutnya

yaitu berkaitan dengan kelajuan

rata-rata dan kecepatan rata-rata Apa

sih bedanya kelajuan dan kecepatan

Hai sebenarnya kelajuan rata-rata itu

merupakan jarak yang ditempuh dalam

selang waktu tertentu atau kelajuan

rata-rata itu sama dengan jarak dibagi

dengan selang waktunya atau kalau

dirumuskan V = X per deltate sedangkan

kecepatan rata-rata itu merupakan

Perpindahan yang ditempuh dalam selang

waktu tertentu Atau kalau dirumuskan V

itu = delta expert Denta teh JD bedanya

Kalau mencari kelajuan yang kita gunakan

adalah jaraknya Sedangkan untuk mencari

kecepatan yang kita pakai adalah

perpindahannya Oke sobat fisika Coba

kita lihat contohnya sebagai berikut ini

Oke disitu ada sebuah benda bergerak

dari titik A ke titik c melalui titik B

jika AB = 50 m bc30 m dan waktu yang

dibutuhkan dari akad c adalah 20 sekon

Tentukan kelajuan

rata-rata dan kecepatan rata-rata benda

tersebut Oke Mari kita bahas jadi benda

tersebut dia bergerak dari Aa dari a ke

c tetapi melalui titik B Jadi sebelum ke

c dari Adia bergerak ke KB dulu baru ke

KC Nah di sini aku B itu adalah 56

Kemudian dari B ke c itu sejauh 30 M nah

totalnya dari a ke b kemudian kece itu

ditempuh dalam waktu 20 sekon maka

berapakah kelajuan rata-rata dan

kecepatan rata-ratanya Oke dari soal

tersebut kita tahu bahwa jaraknya berapa

nih ya jarak yang ditempuh itu berarti

total lintasannya atau 50 ditambah 30hp

ditambah BC itu 80 M2 sedangkan

perpindahan benda tersebut

lebihnya tadi perpindahan adalah jarak

terpendek dari titik awal ke titik akhir

titik awalnya niddk titik akhirnya di

titik c o berhenti perpindahannya itu =

AC dan Aceh itu sama dan berapa nih kece

berarti sama dan 50 dikurangi 30 ya 20 m

CD jaraknya 80 m2 dan perpindahannya

adalah 20 m Nah dari sini kita bisa

mencari nih kelajuan rata-rata dan

kecepatan rata-ratanya Oke kelajuan

rata-rata itu sama dengan jarak dibagi

dengan selang waktu atau hanya berarti

sama dengan jaraknya 80 dibagi selang

waktunya 20 sekon dia kelajuan

rata-ratanya berarti sama dengan empat

meter per sekon sedangkan kecepatan

rata-rata itu sama dan perpindahan

dibagi selang waktu atau freenya berarti

sama dan perpindahannya 20 dibagi selang

waktunya

Hai 20 atau = 1 m2 kondom jadi kelajuan

rata-ratanya adalah empat meter per

sekon dan kecepatan rata-ratanya Dilah 1

meter per sekon cukup mudah bukan

karaoke tidak lanjut kebesaran

berikutnya yaitu percepatan rata-rata

dan percepatan rata-rata itu merupakan

perubahan kecepatan tonil tangkai dalam

selang waktu tertentu Atau kalau

dirumuskan Aa itu = delta V pergi rotate

dimana Delta v nya bisa kita cari dari

V2 dikurangi V1 dibagi di lantainya T2

Menteng 1 key Nah contoh nih diketahui

Sebuah mobil melaju dengan kecepatan

awal dua meter per sekon setelah mobil

melaju 10 sekon kecepatan mobil tersebut

bertambah menjadi empat meter per sekon

berapakah percepatan yang dimiliki oleh

mobil tersebut

hai oke mari kita bahas Oke ingat bahwa

a = Delta fever deltatime gimana

kecepatan awalnya itu dua meter per

sekon kemudian bertambah menjadi empat

meter per sekon berarti Delta v nya kan

4 kurangi dua dibagi dalam selang waktu

10sekon jadi nilainya sama dengan empat

mendua dibagi 10 menit nol Ya terus =

0,2 m per sekon kuadrat Nah selanjutnya

kita akan belajar tentang pesanan

berikutnya yaitu berkaitan dan kecepatan

sesaat dan percepatan sesaat nah sebelum

kita membahas tentang kecepatan sesaat

dan percepatan sesaat Oke karena di

Matematika itu untuk kelas 10 itu belum

dapat materi tentang turunan ke ini sini

Ayo kita akan membahas terlebih dahulu

konsep matematika turunan misalnya nih

jika ada fungsi y = AX pangkat TNI maka

turunan Yi terhadap X dapat dituliskan y

aksen atau d y per DX gimana ya saya

atau dpdx itu sama dengan adik alien x

pangkat n match 1 jadi cara menurunkan

fungsi ini kalau ada fungsi AX pangkat n

maka turunannya adalah a dikali

pangkatnya nexok40 kita kurangi 1.2 ahli

n x pangkat n match 1 ke biar lebih muda

kita lihat nih contohnya contoh misal

ada yes

mendingan 4x ^ 3 ini kalau diturunkan

berarti DJ DX = 4 kali 3x pangkatnya

kurangi 13 min 1 atau berarti DX = 4

kali 3 12 x pangkat 3 min 1 berarti

tinggal x kuadrat buah cukup mudah bukan

Oke contoh yang lain Nih misalnya da y =

2x ^ 3 + 12 x min 3 berarti kalau

diturunkan jadinya berapa nih Oke coba

dulu deh oke oke sudah oke ya kita bahas

Oke kalau y = 2x ^ 3 + 12 x-men 3

berhenti turunnya the idx sama dengan

Nah kayak gini kita turunkan

sendiri-sendiri masing-masing ini lebih

dua kali 3x

Hai tangannya kurang jatuh jadi x ^ 3 b

1 + nah ini 12x kalau diturunkan ini

cantiknya pangkat-1 Jadi kalau

diturunkan udah cukup buang aja action

jadi tinggal 12 Kok bisa gitu ya asli

akan dari 12 kali pangkatnya ini

anchanto x pangkat satu min 140 X ^

London satu ya Jadi kalau ada Ohm gitu

kalau diturunkan cukup = a gitu aja tahu

kalau misalnya punya kalau Echa

pangkatnya itu satu kalau diturunkan dah

hilangkan aja x-nya gitu men3 Ini kalau

diturunkan Nah ini kan enggak punya

variabel x Jadi kalau diturunkan

nilainya sama dengan nol Oke di ddx itu

= 6x kuadrat + 12 Oke sekarang kalau

misalnya

Hai variabelnya bukan exchange contoh

lain game salah Dr = 4T kuadrat ditambah

5t men8 kalau misal er ini kita turunkan

terhadap t jadinya gimana nih he Dr DT

sama dengan ini sama aja cuman kalau

tadi kan pakainya X kata ini variabelnya

pakai td4 kali 2ply pangkat dan keduanya

kurang satu ditambahnya ini 5td nah ini

pangkatnya jantung tanya ilangin aja

jadi sama dan lima men8 Ini kan enggak

enggak datanya jadi kalau diturunkan itu

sama dengan nol jadi drjt = 4 kali dua

harian88 teh pangkatnya tinggal satu

ditambah richma gitu Nah itu konsep

turunan Oke kita kembali lagi ke

kecepatan sesaat dan percepatan sesaat

nah

khatam sesaat dan Percepatan saat itu

adalah kecepatan dan percepatan pada

saat T atau waktu tertentu kalau

kecepatan rata-rata itu kan berarti

rata-rata dari kecepatan keseluruhan

perjalanan ditelan tapi kalau kecepatan

sesaat itu adalah kecepatan pada saat

tertentu misalnya pada detik pertama

pada detik kedua pada detik ketiga itu

nilainya berapa nanti dengan

berbeda-beda gitu kan Nah itu yang

namanya kecepatan sesaat Nah untuk

mempelajari kecepatan sesaat dan

Percepatan saat naik sini coba

perhatikan tangga berikut ini di sini

ada posisi atau er kemudian turun satu

tangga di sini Dek kecepatan atau fade

turun satu tangga lagi di sini the

percepatan atau Aa nah kecepatan

kecepatan saat itu merupakan turunan

pertama posisi terhadap waktu atau VCD

itu ada

Hai dr.di tank atau V itu merupakan

turunan posisi terhadap waktu sedangkan

percepataan itu merupakan turunan

pertama kecepatan terhadap waktu atau

turunan kedua posisi terhadap waktu atau

kalau dirumuskan Asama dengan dvbt2

sinyal percepatan itu adalah turunan

kecepatan terhadap waktu mudah Biar

lebih jelas Yuk kita lihat contoh

soalnya contoh misalnya di sini ada

persamaan posisi benda er dalam variabel

T = 4 Y pangkat 3 min 5 temin 12 jika R

dalam meter dan t dalam detik maka

tentukanlah a persamaan kecepatan B

kecepatan benda saat taunya satu sekon

dan C persamaan percepatan nya oke kita

bahas disitu persamaan

Hai posisi benda itu adalah R = 4 Y

pangkat 3 min 5 t-minus 12 nah yang

pertama kita diminta untuk menentukan

persamaan kecepatan Nah kita ingat lagi

ning bahwa kecepatan itu adalah turunan

pertama dari posisi atau Dr BTD V itu

adalah turunan er terhadap t y Ti untuk

mencari persamaan kecepatannya cukup

kita turunkan persamaan ini nah 4T

pangkat 3 min 5 theme 12 kalau

diturunkan berarti sama dengan Dewi

Rabbani di sini berarti empat kali 3-12

kan teh ^ bakatnya kurangi saat tuh key

berarti jadinya 4 kali 3t ^ didiamin

1.mei nah ini lima tenar banget nyengat

10

Nah tadi cukup langsung di hilangkan aja

kemudian main 12 ini enggak ada tainya

berarti nilai sama dengan nol jadi

menerima minol tahu berarti V = 12 teh

kuadrat min 5 itu persamaan kecepatannya

nah yang B kita diminta untuk menentukan

kecepatan benda saat t = 1 sekolah na

kita kan udah dapet persamaan

kecepatannya nih V = 12 Twitter admin 56

berarti kecepatan benda saat t 1sekon

cukup lainnya kita ganti jadi satu sekon

aja Jadi V = 12 kali satu kuadrat min 5

atau = 7 meter per sekon kemudian yang c

kita diminta untuk menentukan persamaan

percepatan nya eh ingat bahwa percepatan

itu adalah turunan pertama dari kaca

patahan atau DVD GT

jadi untuk mencari percepatannya cukup

kita turunkan persamaan dari

kecepatannya atau 12 frekuensi Redmi 5

ini kalau diturunkan jadinya berapa nih

kek Melati jadinya sama dan 12 kali 2T ^

tangannya kurangi satu main ini limanya

kan enggak datangnya berarti kalau

diturunkan sama dengan nol tahu berarti

a = 24th gitu oke sahabat fisika itu

tadi beberapa besaran-besaran dalam

gerak lurus pembahasan lainnya di video

berikutnya ya cek list kalau menurut

kalian video ini bermanfaat silahkan

like and share ya jangan lupa subscribe

juga saya Yusuf Ahmad Terima kasih

selama alaikum warahmatullahi

wabarakatuh

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