Hukum Newton Tentang Gerak (Hukum 1 Newton, Hukum 2 Newton, dan Hukum 3 Newton)
Summary
TLDRThis video script delves into Sir Isaac Newton's three laws of motion, providing explanations and practical examples to illustrate their applications. It covers Newton's first law, explaining inertia and constant velocity; the second law, which relates force, mass, and acceleration; and the third law, highlighting the equal and opposite reaction forces. The script also includes examples like a car braking and swimming to demonstrate these principles, aiming to help viewers grasp Newton's foundational laws of physics.
Takeaways
- 📚 Newton's First Law states that an object will maintain its state of rest or uniform motion in a straight line unless acted upon by an external force.
- 🚗 The concept of inertia is illustrated by the example of passengers in a car that suddenly brakes, causing them to lurch forward due to the unbalanced force.
- 🔢 Newton's Second Law is mathematically represented as F = ma, where F is the force applied, m is the mass of the object, and a is the acceleration.
- 💡 The law implies that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
- 🌰 An example provided explains that a 2 kg object on a frictionless surface experiences an acceleration of 15 m/s² when a force of 30 N is applied.
- 🤝 Newton's Third Law asserts that for every action, there is an equal and opposite reaction, meaning forces between two objects are equal in magnitude and opposite in direction.
- 🏊♂️ The law is exemplified by a swimmer pushing water backwards with their hands, which in turn propels them forward due to the water exerting an equal and opposite force.
- 🚀 Practical applications of Newton's laws include the thrust of a rocket, the push of a foot against the ground while walking, and the flap of a bird's wings.
- 📉 The script includes problem-solving examples to help viewers understand how to apply Newton's laws to calculate forces and accelerations in different scenarios.
- 👍 The video encourages viewers to subscribe for updates and to like the video if they find it helpful, indicating the educational intent of the content.
Q & A
What are the three laws of motion proposed by Newton?
-The three laws of motion proposed by Newton are: 1) An object will remain at rest or in uniform motion in a straight line unless acted upon by a net external force. 2) The rate of change of momentum of an object is directly proportional to the net force applied to it and occurs in the direction in which the force is applied. 3) For every action, there is an equal and opposite reaction.
What does Newton's first law of motion imply about the state of an object when no net force is acting on it?
-Newton's first law, also known as the law of inertia, implies that if no net force is acting on an object, it will maintain its current state, either at rest or moving at a constant velocity in a straight line.
How is the relationship between force, mass, and acceleration described in Newton's second law of motion?
-Newton's second law of motion states that the acceleration of an object (a) is directly proportional to the net force (F) acting on it and inversely proportional to its mass (m). Mathematically, this is expressed as 'a = F/m'.
What is an example given in the script to illustrate Newton's second law of motion?
-An example given in the script is of an object with a mass of 2 kg being pulled on a frictionless floor with a force of 30 N. The resulting acceleration of the object is calculated to be 15 m/s².
What does Newton's third law of motion state about the forces between two interacting objects?
-Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that the forces two objects exert on each other are equal in magnitude but opposite in direction.
Can you provide an example from the script that demonstrates Newton's third law of motion?
-An example from the script is when a person swims; the force exerted by their hands on the water (action) results in an equal and opposite force from the water on their hands (reaction), propelling the person forward.
What is the phenomenon described in the script when a car suddenly brakes while passengers are inside?
-The phenomenon described is that when a car suddenly brakes, the passengers are pushed forward due to their inertia trying to maintain their initial state of motion, even though the car has stopped.
How does the script explain the effect of mass on the acceleration of an object under the influence of a force?
-The script explains that the acceleration of an object is inversely proportional to its mass. The greater the mass, the smaller the acceleration for a given force.
What is the formula used to calculate the acceleration of an object in the example provided in the script?
-The formula used to calculate the acceleration of an object in the example is 'a = F/m', where F is the force applied and m is the mass of the object.
How does the script relate the concept of Newton's laws of motion to everyday life?
-The script relates Newton's laws to everyday life by providing examples such as the force of a person's foot against the floor when walking, the propulsion of a rocket due to the expulsion of gases, the flapping of a bird's wings to lift off, and the rebound of a ball when thrown against a wall.
What is the purpose of the script's explanation of Newton's laws of motion?
-The purpose of the script's explanation is to help viewers understand the fundamental principles of classical mechanics, which describe the relationship between the motion of objects and the forces acting upon them.
Outlines
📚 Newton's First Law: Inertia and Constant Velocity
This paragraph introduces Newton's First Law, which states that an object will maintain a constant velocity unless acted upon by a non-zero net force. It explains the concept of inertia through the example of a passenger in a suddenly braking car, illustrating the force of the seatbelt as the reaction to the car's deceleration. The law is fundamental in understanding motion and the balance of forces.
🚀 Newton's Second Law: Force, Mass, and Acceleration
The second paragraph delves into Newton's Second Law, which quantifies the relationship between force, mass, and acceleration. It is mathematically expressed as \( F = ma \), where \( F \) is the force applied, \( m \) is the mass of the object, and \( a \) is the acceleration. The paragraph provides an example of calculating acceleration when a force is applied to an object with a given mass on a frictionless surface, demonstrating how greater force results in greater acceleration and how mass inversely affects acceleration.
🔄 Newton's Third Law: Action and Reaction Forces
The final paragraph discusses Newton's Third Law, which describes the interaction between two bodies where the forces are equal in magnitude but opposite in direction. It uses the example of swimming, where the hand pushes against the water, and the water pushes back with an equal force, propelling the swimmer forward. This law is crucial for understanding reciprocal forces in various everyday phenomena, such as walking, rocket propulsion, and a bird flapping its wings.
Mindmap
Keywords
💡Newton's First Law
💡Inertia
💡Newton's Second Law
💡Acceleration
💡Newton's Third Law
💡Action and Reaction
💡Force
💡Resultant Force
💡Mass
💡Frictionless Surface
Highlights
Introduction to the three laws of motion formulated by Isaac Newton, an English physicist.
Explanation of Newton's first law, stating that an object will maintain a constant velocity unless acted upon by a non-zero net force.
Illustration of Newton's first law using the example of a car braking suddenly and the passengers' reaction.
Statement of Newton's second law, relating force, mass, and acceleration with the formula F = ma.
Example to demonstrate Newton's second law, showing how increasing force results in greater acceleration.
The inverse relationship between mass and acceleration, as explained by Newton's second law.
A practical example problem solving the acceleration of a 2 kg object on a slippery floor with a 30 N force.
Introduction to Newton's third law, which states that for every action, there is an equal and opposite reaction.
Explanation of how Newton's third law applies to swimming, where the force of the hand pushing water backward results in a forward motion.
Real-world applications of Newton's laws, including walking, rocket propulsion, rowing, and bird flight.
A problem-solving example involving calculating the force needed to accelerate a 20 kg object on a slippery floor.
Another example problem involving calculating the tension in a rope pulling a system of two masses.
The importance of understanding Newton's laws for practical applications in everyday life and scientific study.
Encouragement to like the video if it was helpful for understanding Newton's laws.
The video concludes with a summary of the significance of Newton's laws in physics and their impact on various phenomena.
Transcripts
Hai kisah N merupakan seorang Fisikawan
kebangsaan Inggris yang Mencetuskan tiga
hukum tentang gerak ketiganya dibagi
menjadi hukum pertama Newton Hukum kedua
Newton dan hukum ketiga Newton dalam
video ini kita akan membahas tentang
ketiga Hukum Newton dan beberapa contoh
aplikasinya namun sebelum kita lanjut
bagi Anda yang belum subscribe silahkan
subscribe terlebih dahulu agar anda
tidak ketinggalan update video terbaru
dari channel ini hukum pertama Newton
Hukum pertama Newton berbunyi bahwa
setiap benda akan memiliki kecepatan
yang konstan kecuali ada gaya yang
resultannya tidak nol bekerja pada benda
tersebut
Hai apabila jumlah seluruh gaya yang
bekerja pada benda itu sama dengan nol
atau biasa disebut sebagai resultan gaya
nol maka benda itu akan tetap diam atau
benda itu akan tetap bergerak dengan
kecepatan tetap atau tidak mengalami
percepatannya hukum ini dapat dijelaskan
oleh fenomena Ketika seseorang berada di
dalam mobil yang sedang melaju kencang
dan tiba-tiba mobil direm mendadak
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fenomena itu menggambarkan bahwa awalnya
penumpang diam di dalam mobil Namun
karena ada gaya rem yang melawan ke
belakang menyebabkan resultan gaya tidak
nol sehingga penumpang terdorong ke
depan karena berusaha mempertahankan
kelembaban atau inersia nya hukum kedua
Newton
Hai hukum kedua Newton berbunyi bahwa
jika sebuah benda dengan massa m
mendapatkan gaya sebesar F maka benda
akan mengalami percepatan atau yang
besarnya berbanding lurus terhadap F dan
berbanding terbalik terhadap massa benda
atau m secara matematis pernyataan itu
dapat dituliskan sebagai berikut a = frm
dimana a sama dengan percepatan benda
dalam satuan meter per sekon kuadrat F =
gaya yang diberikan terhadap benda dalam
satuan n dan m = massa benda dalam
satuan kg sebagai contoh apabila kita
memberikan gaya yang menyebabkan benda
bergerak maka semakin besar gaya yang
diberikan
Hai semakin besar pula percepatan yang
dialami benda Percepatan benda tersebut
juga dipengaruhi oleh massa benda jika
massa benda semakin besar maka
Percepatan benda semakin kecil Hal
inilah yang dimaksudkan bahwa percepatan
benda berbanding terbalik dengan massa
benda secara matematis contoh hukum
kedua Newton dapat ditunjukkan oleh soal
berikut ini Sebuah benda bermassa 2 kg
yang berada diatas lantai licin ditarik
dengan gaya sebesar 3000 perkirakan
percepatan yang akan dialami oleh benda
tersebut penyelesaian a
sama dengan eferen as = 30 N part 2 kg
sehingga diperoleh nilai a = 15 m per
sekon kuadrat hukum ketiga Newton
Hai hukum ketiga Newton menyatakan bahwa
gaya aksi dan reaksi dari dua benda
memiliki nilai yang sama segaris namun
berlawanan artinya jika ada benda A yang
memberi gaya sebesar F pada benda b maka
benda B akan memberi gaya sebesar
negatif F kepada benda A misalnya pada
peristiwa orang berenang gaya aksi dari
tangan ke air mengakibatkan Gaya reaksi
dari air ke tangan dengan besar gaya
yang sama namun arah gaya berlawanan
sehingga orang tersebut akan terdorong
ke depan meskipun tangannya mengayuh ke
belakang karena masa air jauh lebih
besar daripada massa orang maka
percepatan yang di
demi orang akan jauh lebih besar
daripada percepatan yang dialami air hal
ini mengakibatkan orang tersebut akan
melaju kedepan rel
gitu beberapa contoh dari kejadian
sehari-hari dari hukum Newton adalah
Hai dorongan kaki terhadap lantai ketika
berjalan yang menyebabkan seolah-olah
kaki mendapat dorongan oleh lantai gaya
dorong gas ketika roket terbaru
Hai dorongan gayung yang menyebabkan
perahu terdorong kedepan kepakan sayap
burung ke bawah yang menyebabkan badan
burung terdorong ke atas dan pantulan
bola ketika dilempar ke dinding untuk
membantu anda dalam memahami Hukum
Newton Mari perhatikan beberapa contoh
soal hukum Newton berikut ini contoh
soal 1 Perhatikan gambar berikut ini
Sebuah benda bermassa 20 kg diletakkan
diatas lantai licin benda tersebut
didorong dengan sejumlah gaya sehingga
bergerak dengan percepatan sebesar 2
meter per sekon kuadrat perkirakan besar
gaya yang mendorong benda itu
Hai mungkin penyelesaian soal tersebut
menanyakan besar gaya atau F sesuai
dengan penjelasan sebelumnya percepatan
atau a = f em sehingga f = m * a f = 20
kali dua sehingga diperoleh nilai F =
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4000 soal2 Perhatikan gambar berikut
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Berdasarkan gambar tersebut berapakah
tegangan tali yang ditunjukkan oleh
huruf t penyelesaian percepatan sistem
dapat
itung sebagai berikut a = fm1 ditambah
M2 a = 50% 7 plus 3G ah sama dengan 50
persepuluh sehingga diperoleh nilai a =
5 meter per sekon kuadrat tegangan atau
tag terjadi karena benda bermassa 7 kg
yang menghambat pergerakan sistem jika
kita tinjau benda pertama maka t = m1di
kalian tes sama dengan 7 dikali lima
sehingga diperoleh nilai T = 30
n Sekian dulu pembahasan tentang hukum
Newton berikan like jika video ini
bermanfaat bagi anda
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