Biology
Chemistry
AP Chemistry
English
AP English Literature
AP Physics 1
Dec 7, 2025
138
11 pages
Demi Zenit @demizenit_ftbu
Newton's Second Law of Motion is one of the fundamental principles that explains how forces affect motion. This... Show more
Ever wonder why it's harder to push a loaded shopping cart than an empty one? Newton's Second Law explains exactly this relationship between force and motion.
This fundamental law of physics helps us understand everything from rocket launches to why it hurts more when a heavy object falls on your foot compared to a light one.
Newton's Second Law states that the net force acting on an object equals the product of its mass and acceleration.
This relationship is expressed in the simple but powerful equation F = ma
When you push objects of different weights, you're experiencing this law firsthand - heavier objects need more force to achieve the same acceleration as lighter ones.
💡 Think of it this way if you double the force on an object, you'll double its acceleration. If you double the mass while keeping the force the same, you'll cut the acceleration in half.
You've probably noticed that pushing a heavy box requires more effort than pushing a light one the same distance. That's Newton's Second Law at work!
The law explains why a bowling ball and a ping pong ball feel so different when you try to move them, even though they're roughly the same size.
Your everyday experiences confirm this law - from pushing a loaded shopping cart (ouch, heavy!) to pushing an empty one (fun, light!).
The Second Law gives us a precise mathematical relationship F = m × a
In this equation
This simple equation allows scientists and engineers to calculate exactly how much force is needed to move objects of different masses.
💡 This equation is so powerful that it's used to design everything from car engines to rocket ships!
Force is measured in units called newtons (N), named after Sir Isaac Newton himself.
One newton is defined as the force needed to accelerate a one-kilogram mass at a rate of one meter per second per second .
This precise definition helps scientists and engineers make exact calculations about forces in the world around us.
Let's solve a real-world problem How much force is needed to accelerate a 1400 kg car by 2 m/s²?
First, identify the formula F = m × a
Then plug in the values F = 1400 kg × 2 m/s²
Finally, solve the equation F = 2800 kg·m/s² = 2800 N
That means you would need 2800 newtons of force - roughly the weight of a small car - to achieve this acceleration!
💡 You can use this same process to calculate the force needed for any object's acceleration once you know its mass.
You might know that objects of different weights fall at the same rate (acceleration), but they don't hit the ground with the same force!
A 10 kg object experiences a gravitational force of 98 N, while a 1 kg object experiences only 9.8 N - though both accelerate at 9.8 m/s².
This explains why dropping a bowling ball on your foot hurts much more than dropping a golf ball, even though they fall at the same speed!
💡 The formula F = ma explains why heavier falling objects cause more damage - they have greater mass, so they hit with greater force.
Newton's Law of Universal Gravitation explains that the gravitational force between objects depends on their masses and distance.
The greater an object's mass, the stronger its gravitational pull. However, the force weakens as the distance between objects increases.
This law explains why Earth's gravity keeps us grounded, why the Moon orbits Earth, and why planets orbit the Sun.
When thinking about a collision between a dump truck and a Honda Civic, Newton's Second Law helps predict what happens.
This activity asks you to predict which vehicle would experience a greater change in motion during a head-on collision.
The answer requires understanding how force, mass, and acceleration relate to each other according to F = ma.
In a collision between vehicles with very different masses like a dump truck and Honda Civic, Newton's Second Law has major implications.
Since F = ma, when the same force acts on objects of different masses, the acceleration they experience will differ significantly.
The vehicle with less mass (the Honda Civic) will experience much greater acceleration—and therefore a much more dramatic change in motion.
💡 This is why smaller vehicles fare worse in collisions with larger ones—the force is similar for both, but the smaller vehicle experiences far greater acceleration due to its smaller mass.
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
You can download the app in the Google Play Store and in the Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
8
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Explore the fundamental concepts of dynamics, including weight, mass, gravity, acceleration, and Newton's laws of motion. This summary covers key topics such as terminal velocity, speed calculations, and the relationship between force and mass. Ideal for students preparing for exams or seeking to understand the principles of motion and forces.
PhysicsNotes on the differences between distance and displacement, including definitions of position, distance, and displacement, explanations of how to use cardinal directions in physics, vector vs. scalar, and word problem examples.
Physicskinematic terms in physics
PhysicsDefinition and examples
Physics2 dimension kinematics in physics
Physics- Applied Force - Normal Force - Frictional Force - Tension Force - Free body diagrams - Force & Newton's second law
PhysicsApp Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Demi Zenit
@demizenit_ftbu
Newton's Second Law of Motion is one of the fundamental principles that explains how forces affect motion. This law gives us a precise mathematical relationship between force, mass, and acceleration that helps predict how objects will move when forces act... Show more
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Ever wonder why it's harder to push a loaded shopping cart than an empty one? Newton's Second Law explains exactly this relationship between force and motion.
This fundamental law of physics helps us understand everything from rocket launches to why it hurts more when a heavy object falls on your foot compared to a light one.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Newton's Second Law states that the net force acting on an object equals the product of its mass and acceleration.
This relationship is expressed in the simple but powerful equation: F = ma
When you push objects of different weights, you're experiencing this law firsthand - heavier objects need more force to achieve the same acceleration as lighter ones.
💡 Think of it this way: if you double the force on an object, you'll double its acceleration. If you double the mass while keeping the force the same, you'll cut the acceleration in half.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
You've probably noticed that pushing a heavy box requires more effort than pushing a light one the same distance. That's Newton's Second Law at work!
The law explains why a bowling ball and a ping pong ball feel so different when you try to move them, even though they're roughly the same size.
Your everyday experiences confirm this law - from pushing a loaded shopping cart (ouch, heavy!) to pushing an empty one (fun, light!).
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The Second Law gives us a precise mathematical relationship: F = m × a
In this equation:
This simple equation allows scientists and engineers to calculate exactly how much force is needed to move objects of different masses.
💡 This equation is so powerful that it's used to design everything from car engines to rocket ships!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Force is measured in units called newtons (N), named after Sir Isaac Newton himself.
One newton is defined as the force needed to accelerate a one-kilogram mass at a rate of one meter per second per second .
This precise definition helps scientists and engineers make exact calculations about forces in the world around us.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Let's solve a real-world problem: How much force is needed to accelerate a 1400 kg car by 2 m/s²?
First, identify the formula: F = m × a
Then plug in the values: F = 1400 kg × 2 m/s²
Finally, solve the equation: F = 2800 kg·m/s² = 2800 N
That means you would need 2800 newtons of force - roughly the weight of a small car - to achieve this acceleration!
💡 You can use this same process to calculate the force needed for any object's acceleration once you know its mass.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
You might know that objects of different weights fall at the same rate (acceleration), but they don't hit the ground with the same force!
A 10 kg object experiences a gravitational force of 98 N, while a 1 kg object experiences only 9.8 N - though both accelerate at 9.8 m/s².
This explains why dropping a bowling ball on your foot hurts much more than dropping a golf ball, even though they fall at the same speed!
💡 The formula F = ma explains why heavier falling objects cause more damage - they have greater mass, so they hit with greater force.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Newton's Law of Universal Gravitation explains that the gravitational force between objects depends on their masses and distance.
The greater an object's mass, the stronger its gravitational pull. However, the force weakens as the distance between objects increases.
This law explains why Earth's gravity keeps us grounded, why the Moon orbits Earth, and why planets orbit the Sun.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
When thinking about a collision between a dump truck and a Honda Civic, Newton's Second Law helps predict what happens.
This activity asks you to predict which vehicle would experience a greater change in motion during a head-on collision.
The answer requires understanding how force, mass, and acceleration relate to each other according to F = ma.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
In a collision between vehicles with very different masses like a dump truck and Honda Civic, Newton's Second Law has major implications.
Since F = ma, when the same force acts on objects of different masses, the acceleration they experience will differ significantly.
The vehicle with less mass (the Honda Civic) will experience much greater acceleration—and therefore a much more dramatic change in motion.
💡 This is why smaller vehicles fare worse in collisions with larger ones—the force is similar for both, but the smaller vehicle experiences far greater acceleration due to its smaller mass.
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
You can download the app in the Google Play Store and in the Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
8
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Explore the fundamental concepts of dynamics, including weight, mass, gravity, acceleration, and Newton's laws of motion. This summary covers key topics such as terminal velocity, speed calculations, and the relationship between force and mass. Ideal for students preparing for exams or seeking to understand the principles of motion and forces.
PhysicsNotes on the differences between distance and displacement, including definitions of position, distance, and displacement, explanations of how to use cardinal directions in physics, vector vs. scalar, and word problem examples.
Physicskinematic terms in physics
PhysicsDefinition and examples
Physics2 dimension kinematics in physics
Physics- Applied Force - Normal Force - Frictional Force - Tension Force - Free body diagrams - Force & Newton's second law
PhysicsApp Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Algebra
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Algebra 1
Overige