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Britain & the wider world: 1745 -1901
1l the quest for political stability: germany, 1871-1991
The cold war
Inter-war germany
Medieval period: 1066 -1509
2d religious conflict and the church in england, c1529-c1570
2o democracy and nazism: germany, 1918-1945
1f industrialisation and the people: britain, c1783-1885
1c the tudors: england, 1485-1603
2m wars and welfare: britain in transition, 1906-1957
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2s the making of modern britain, 1951-2007
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Physics
17 Dec 2025
125
1 page
hotline_bling @hotline_bling
Physics mechanics explores how objects move and respond to forces. It's a fundamental area of physics where we... Show more
Everything in mechanics can be classified as either vector quantities (having both size and direction) like weight and forces, or scalar quantities (having only size) like mass and time. This distinction is crucial when solving physics problems.
Forces change how objects move by altering their speed or direction. Measured in newtons (N), they're represented as arrows on diagrams, with the arrow length showing strength and direction. Newton's laws explain how forces work the 1st law states objects stay at rest or in constant motion unless a force acts on them; the 2nd law shows acceleration depends on force and mass; while the 3rd law tells us every action has an equal and opposite reaction.
When objects collide, different things can happen. In elastic collisions, both momentum and energy are conserved. Partially inelastic collisions lose some kinetic energy but objects separate, while in totally inelastic collisions objects stick together afterward.
Quick Tip When drawing force diagrams, make sure the length of your arrows is proportional to the force strength - this visual representation helps you understand which forces dominate in a system.
Materials respond differently to forces. Hooke's Law states that a material's extension is proportional to the applied force up to its elastic limit. Brittle materials like glass follow this law until they break suddenly, while ductile materials stretch beyond their elastic limit before breaking. Rubber materials don't follow Hooke's Law at all because of their unique chemical properties.
In circular motion, an object may have constant speed but its direction constantly changes. This change in direction means there's acceleration toward the center, requiring a centripetal force that keeps the object moving in a circle rather than flying off in a straight line.
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
7
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Dive into the fundamentals of Newton's Laws of Motion with this comprehensive guide. Explore key concepts such as free fall, terminal velocity, and the action-reaction principle. Includes worked examples and practice questions tailored for Physics NAT5 students. Perfect for mastering the principles of force, weight, and motion.
PhysicsExplore key concepts in mechanics, including Newton's Laws of Motion, gravitational potential energy, and the Work-Energy Principle. This summary covers essential topics such as velocity, displacement, and conservation of momentum, providing a comprehensive overview for students studying physics. Ideal for exam preparation and understanding core mechanics principles.
PhysicsExplore key principles of Newton's Laws of Motion, energy types, and rectilinear motion in this comprehensive summary. Understand concepts like linear momentum, gravitational potential energy, and the work-energy principle, essential for mastering Unit 1 Edexcel physics topics.
PhysicsExplore the fundamentals of centripetal motion in this A Level Physics summary. Understand key concepts such as centripetal acceleration, angular velocity, and the forces involved in circular motion. Ideal for AQA students preparing for exams, this resource covers essential equations and principles of rotational dynamics.
PhysicsExplore key concepts in Mechanics and Materials for AQA A-Level Physics, including Newton's Laws, energy conservation, kinematic equations, and projectile motion. This summary covers essential principles such as static equilibrium, elastic potential energy, and the work-energy principle, providing a comprehensive understanding for Year 12 and Year 13 students.
PhysicsExplore detailed solutions to the OCR A Level Physics June 2018 paper, covering key concepts such as Newtonian Mechanics, Circular Motion, Gravitational Fields, and more. This comprehensive resource includes worked examples and explanations for each question, making it an essential study tool for mastering physics concepts and exam preparation.
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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
hotline_bling
@hotline_bling
Physics mechanics explores how objects move and respond to forces. It's a fundamental area of physics where we learn about forces, motion, collisions, and materials - concepts that explain everything from why cars stop when you brake to how buildings... Show more
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Everything in mechanics can be classified as either vector quantities (having both size and direction) like weight and forces, or scalar quantities (having only size) like mass and time. This distinction is crucial when solving physics problems.
Forces change how objects move by altering their speed or direction. Measured in newtons (N), they're represented as arrows on diagrams, with the arrow length showing strength and direction. Newton's laws explain how forces work: the 1st law states objects stay at rest or in constant motion unless a force acts on them; the 2nd law shows acceleration depends on force and mass; while the 3rd law tells us every action has an equal and opposite reaction.
When objects collide, different things can happen. In elastic collisions, both momentum and energy are conserved. Partially inelastic collisions lose some kinetic energy but objects separate, while in totally inelastic collisions objects stick together afterward.
Quick Tip: When drawing force diagrams, make sure the length of your arrows is proportional to the force strength - this visual representation helps you understand which forces dominate in a system.
Materials respond differently to forces. Hooke's Law states that a material's extension is proportional to the applied force up to its elastic limit. Brittle materials like glass follow this law until they break suddenly, while ductile materials stretch beyond their elastic limit before breaking. Rubber materials don't follow Hooke's Law at all because of their unique chemical properties.
In circular motion, an object may have constant speed but its direction constantly changes. This change in direction means there's acceleration toward the center, requiring a centripetal force that keeps the object moving in a circle rather than flying off in a straight line.
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
7
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Dive into the fundamentals of Newton's Laws of Motion with this comprehensive guide. Explore key concepts such as free fall, terminal velocity, and the action-reaction principle. Includes worked examples and practice questions tailored for Physics NAT5 students. Perfect for mastering the principles of force, weight, and motion.
PhysicsExplore key concepts in mechanics, including Newton's Laws of Motion, gravitational potential energy, and the Work-Energy Principle. This summary covers essential topics such as velocity, displacement, and conservation of momentum, providing a comprehensive overview for students studying physics. Ideal for exam preparation and understanding core mechanics principles.
PhysicsExplore key principles of Newton's Laws of Motion, energy types, and rectilinear motion in this comprehensive summary. Understand concepts like linear momentum, gravitational potential energy, and the work-energy principle, essential for mastering Unit 1 Edexcel physics topics.
PhysicsExplore the fundamentals of centripetal motion in this A Level Physics summary. Understand key concepts such as centripetal acceleration, angular velocity, and the forces involved in circular motion. Ideal for AQA students preparing for exams, this resource covers essential equations and principles of rotational dynamics.
PhysicsExplore key concepts in Mechanics and Materials for AQA A-Level Physics, including Newton's Laws, energy conservation, kinematic equations, and projectile motion. This summary covers essential principles such as static equilibrium, elastic potential energy, and the work-energy principle, providing a comprehensive understanding for Year 12 and Year 13 students.
PhysicsExplore detailed solutions to the OCR A Level Physics June 2018 paper, covering key concepts such as Newtonian Mechanics, Circular Motion, Gravitational Fields, and more. This comprehensive resource includes worked examples and explanations for each question, making it an essential study tool for mastering physics concepts and exam preparation.
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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
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
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
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
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
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 apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Sociology