hukum newton 1,2 dan 3
Summary
TLDRThis educational video script explores Sir Isaac Newton's laws of motion, crucial for understanding the physics of everyday life. It starts with Newton's First Law, explaining the concept of inertia and the influence of gravity on objects. The script then delves into the Second Law, illustrating the relationship between force, mass, and acceleration. Practical examples, like pulling a chair versus a table, are used to clarify the concept. Finally, the Third Law, concerning action and reaction forces, is introduced with the example of a rocket launching. The script aims to help students grasp these fundamental laws and apply them to real-world scenarios.
Takeaways
- 🔍 The script discusses the concept of force and its relationship to motion, introducing the topic with the example of a car being pushed.
- 🧐 It explains that force is a push or pull exerted on an object, which is a fundamental concept in the study of motion.
- 📚 The learning objectives include understanding Newton's laws of motion, formulating Newton's equations, and applying these laws to everyday life.
- 🍎 The script uses the example of an apple falling from a tree to illustrate the force of gravity, which is a key concept in Newton's laws.
- ✍️ Newton's First Law, also known as the law of inertia, states that an object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an external force.
- 🔄 Newton's Second Law establishes the relationship between force, mass, and acceleration, stating that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
- 🚀 The script provides a practical example of Newton's Second Law by comparing the acceleration of a chair and a table when the same force is applied.
- 🔄 Newton's Third Law, the law of action and reaction, is introduced with the example of a rocket propelling itself forward by expelling gas backward.
- 📐 The script emphasizes the three characteristics of the action-reaction force: they are equal in magnitude, opposite in direction, and occur simultaneously on two interacting objects.
- 🔗 The script concludes with a review of the three laws of Newton, summarizing their significance and application in understanding motion.
Q & A
What is the main concept discussed in the script?
-The main concept discussed in the script is Sir Isaac Newton's three laws of motion, which are fundamental principles in classical physics.
What is the first law of motion according to Newton?
-Newton's first law, also known as the law of inertia, states that an object at rest will stay at rest, and an object in motion will stay in motion with a constant velocity, unless acted upon by an external force.
How is the second law of motion explained in the script?
-The script explains Newton's second law by stating that the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass, which can be represented by the formula F = ma, where F is the force, m is the mass, and a is the acceleration.
What is the significance of the apple falling from the tree mentioned in the script?
-The apple falling from the tree is used to illustrate the concept of gravity, which is a force that causes objects to move towards the center of the Earth and is a key concept leading to Newton's laws of motion.
What does the script imply about the existence of forces in the universe?
-The script implies that in our world, every object is affected by forces, particularly gravitational force, and suggests that it is impossible to find an object that is not influenced by any force.
How does the script describe the relationship between force, mass, and acceleration?
-The script describes that if the mass of an object remains constant, the acceleration is directly proportional to the force applied to it. It also states that acceleration is inversely proportional to the mass, meaning the smaller the mass, the greater the acceleration for the same force.
What is the third law of motion as described in the script?
-Newton's third law, as described in the script, is about the action-reaction forces. It states that for every action, there is an equal and opposite reaction, meaning that the forces between two interacting objects are equal in magnitude and opposite in direction.
How does the script use the example of a rocket to explain Newton's third law?
-The script uses the example of a rocket expelling gas to explain that as the rocket exerts a force on the gas (action), the gas exerts an equal and opposite force on the rocket (reaction), which propels the rocket forward.
What is the purpose of reviewing Newton's laws of motion in the script?
-The purpose of reviewing Newton's laws of motion in the script is to ensure that students understand the fundamental principles governing the motion of objects and can apply this knowledge to everyday life situations.
How does the script summarize the three laws of motion at the end?
-The script summarizes the three laws by stating that the first law deals with the motion of objects when no net force is acting on them, the second law relates acceleration to force and mass, and the third law describes the mutual forces between interacting objects.
Outlines
📚 Newton's Laws of Motion Introduction
The script introduces the concept of forces and their impact on motion, referencing Newton's laws of motion. It poses questions about what causes a car to move and connects it to the learning objectives, which include understanding Newton's laws, formulating Newton's equations, and applying them to everyday life. The script also mentions the historical context of Newton's inspiration from the falling apple incident, leading to the formulation of his laws in 'Philosophiæ Naturalis Principia Mathematica.'
🔍 Newton's First and Second Laws Explained
This section delves into Newton's first law, stating that an object will remain at rest or move at a constant velocity unless acted upon by an unbalanced force. It introduces the concept of inertia and the influence of gravity on all objects on Earth. Newton's second law is then explained, relating the acceleration of an object to the force applied and the object's mass. The script uses the example of pulling a chair versus a table to illustrate how mass affects acceleration. The law is summarized by the equation F = ma, where F is the force, m is the mass, and a is the acceleration. The script also explores the implications of this law with an example involving two blocks with different forces and masses.
🚀 Newton's Third Law of Motion
The final paragraph discusses Newton's third law, which is about the action-reaction force pair. It uses the example of a rocket expelling gas to explain how the rocket moves forward due to the reaction force from the expelled gas. The script outlines the three characteristics of action-reaction forces: they are equal in magnitude, opposite in direction, and occur simultaneously between two interacting objects. The summary concludes with a brief review of the three laws of motion, emphasizing their importance in understanding motion.
Mindmap
Keywords
💡Force
💡Newton's First Law
💡Mass
💡Acceleration
💡Newton's Second Law
💡Gravity
💡Action and Reaction
💡Newton's Third Law
💡Balanced Force
💡Unbalanced Force
💡Inertia
Highlights
Introduction to the concept of force and its role in moving objects.
Connection between force and the learning material being discussed.
Objective of the learning session: understanding Newton's laws of motion.
Historical context of Newton's inspiration from the falling apple incident.
Publication of Newton's laws in 'Philosophiæ Naturalis Principia Mathematica'.
Explanation of Newton's First Law of Motion and its implications.
Discussion on the non-existence of objects unaffected by external forces on Earth.
Newton's Second Law of Motion and the relationship between force, mass, and acceleration.
Practical example of how mass affects acceleration when force is constant.
Mathematical formulation of Newton's Second Law: F = m * a.
Application of Newton's Second Law to calculate the acceleration of two objects with different forces and masses.
Introduction to Newton's Third Law of Motion: action and reaction forces.
Characteristics of action and reaction forces as described in Newton's Third Law.
Practical example of Newton's Third Law using the rocket propulsion system.
Review of the key points learned about Newton's laws of motion.
Summary of Newton's First Law and its mathematical representation.
Summary of Newton's Second Law and its mathematical representation.
Summary of Newton's Third Law and the nature of action and reaction forces.
Transcripts
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hal hal
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Pernahkah kalian melihat orang mendorong
mobil yang
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mogoh Apakah yang menyebabkan mobil
tersebut
bergerak yang menyebabkan mobil tersebut
bergerak adalah
bukan suap Bukan
Sihir mobil tersebut bergerak karena
adanya
gaya gaya merupakan suatu dorongan atau
tarikan yang diberikan pada
benda lalu Apakah hubungan antara gaya
dengan materi pembelajaran kita di saat
ini dan Apakah tujuan pembelajaran kita
di saat
ini Setelah pembelajaran saat ini
selesai siswa diharapkan untuk
mengetahui bunyi hukum Newton rumuskan
dan menghitung Persamaan Hukum Newton
serta mengetahui penerapan hukum Newton
dalam kehidupan sehari-hari
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Masih ingatkah kalian dengan peristiwa
apel yang jatuh dari
pohon ada sebuah gaya yang menyebabkan
benda bergerak jatuh ke bawah yang kita
kenal dengan gaya
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gravitasi dari peristiwa inilah seorang
ilmuan fisika dan
matematika is newon mendapat Ilham bahwa
pada tahun
1686 hasil pemikirannya ini ia tuangkan
dalam sebuah buku yang bernama filosofie
naturalis prinia
matematika yang memuattig hukum newon
tentang
gerak seakah ketiga hukum newon
tenterseb Mari kita bahas
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bersama-sama hukum 1 newon suatu objek
akan tetap diam atau bergerak dengan
kecepatan konstan kecuali ada gaya tidak
seimbang Yang
mempengaruhinya hukum ini kita kenal
dengan hukum
kelembaman Mungkinkah di dunia ini ada
benda yang tidak dipengaruhi oleh
gaya di luar angkasa mungkin ada tetapi
di bumi ini tidak mungkin ada contohnya
saja setiap benda pasti dipengaruhi oleh
gaya gravitasi atau gaya berat dari
keadaan inilah hukum 1 new dap
juga untuk benda yang dipengaruhi gaya
tetapi resultannya
no sehingga hukum 1 new dapat dirumuskan
sebagai Sig F
=0um 2 new kalian telah belajar
bagaimana keadaan benda jika tidak
dipengaruhi gaya atau resultannya nol
Bagaimana jika resultan gaya yang
bekerja tidak nol keadaan inilah yang
dijelaskan Newton pada hukum keduanya
untuk dapat memahami hukum du Newton
kita harus pelajari terlebih dahulu
hubungan antara percepatan benda dengan
massa dan gaya yang
mempengaruhinya ketika kalian mengamati
peristiwa tersebut maka kalian pasti
mengetahui bahwa kemari akan bergerak
lebih cepat ketika didorong oleh lebih
dari satu orang Hal inilah yang
menjelaskan bahwa jika masa tetap maka
Percepatan benda sebanding dengan gaya
yang bekerja pada benda
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tersebut ketika kita menarik kursi dan
meja dengan gaya yang sama manakah yang
percepatan
bes tentu percepatan yang lebih besar
adalah saat kita menarik kursi yang
Manya lebih kecil darada
meja Hal inilah yang membuktikan bahwa
percepatan benda berbanding terbalik
dengan
Manya sehingga semakin Kecila benda maka
akan semakin besar pula
peratannya darjelan
2 new dapat dirumuskan sebagai Sig = m *
a di mana F adalah gaya yang bekerja
pada benda m adalah masa benda dan a
adalah
percepatan Bagaimana jika terdapat dua
buah benda dengan gaya dan Ma yang
berbeda Berapakah besar peratan yang
dialami kedua Penda tersebut
bersama-sama dua buah balok yang
bergerak searah dengan gaya dan massa
yang berbeda balok a memiliki gaya
sebesar 18 n sedangkan balok B memiliki
gaya 2 new dan massa kedua balok
tersebut 2 kg dan 3
KG Nah untuk mendapatkan besar
percepatan pertama-tama kita harus
menjumlahkan gaya dan massa dari kedua
balok tersebut untuk memperoleh besar
nilai Sigma F dan massa
total Setelah itu kita masukkan
Persamaan Hukum 2
newon jadi kecepatan yang dialami oleh
kedua balok tersebut adalah sebesar 4
m/s^ nah bagaimana adik-adik mudah bukan
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selanjutnya kita masuk pada hukum 3 n
pada saat roket menyemburkan gas keluar
maka roket tersebut telah memberikan
gaya aksi pada
gas maka gas itu akan memberikan Gaya
reaksi sehingga dapat mendorong roket
dan menyebabkan roket tersebut bergerak
gaya aksi reaksi inilah yang kita kenal
dengan hukum 3 newon di mana hukum 3
newon tentang gaya aksi reaksi ini
memiliki tiga sifat yaitu yang pertama
sama besar yang kedua berlawanan arah
dan yang ketiga yaitu terjadi pada dua
benda yang saling
berinteraksi sebelum kita menutup
pembelajaran kita di saat ini kita akan
merreview materi pembelajaran di saat
ini agar adik-adik dapat mengingat
kembali apa saja hal penting yang telah
kita pelajari bersama mengenai tiga
hukum Newton tentang
gerak hukum 1 newon menyatakan jika
resultan gaya pada suatu benda sama
dengan 0 maka benda yang diam akan tetap
diam dan benda yang bergerak akan tetap
bergerak dengan kecepatan tetap dengan
persamaan Sigma F = 0 hukum 2 new
menyatakan percepatan yang dihasilkan
oleh resultan gaya yang bekerja pada
suatu benda berbanding lurus dengan
resultan gaya dan berbanding terbalik
dengan massa benda dengan persamaan
Sigma f = m * a hukum 3 new menyatakan
jika benda A mengerjakan gaya pada benda
b maka benda B akan mengerjakan gaya
pada benda A yang besarnya sama tetapi
arahnya berlawanan
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forign
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