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Knowunity Philippines
11/30/2025
Science
Force, Motion, and Energy: Types of Forces and Their Effects
133
•
Nov 30, 2025
•
Knowunity Philippines
@knowunityphilippines
Ever wondered why you feel pushed back in your seat... Show more











Think of force as nature's way of making things happen - it's simply a push or pull that can make objects speed up, slow down, or change direction. Every step you take, every ball you throw, even just sitting in a chair involves forces at work.
Motion is what happens when forces do their job - it's an object changing its position over time. Your phone falling from your hand, a basketball bouncing, or a tricycle moving down the street are all examples of motion in action.
Here's what makes forces tricky: they're vector quantities, which means they have both strength (how hard you push) and direction (which way you push). A gentle nudge forward is very different from a strong shove backward, even though both are forces!
💡 Quick Tip: Remember that forces always come in pairs - when you sit on a chair, you push down on it, and it pushes back up on you with equal strength!

Contact forces happen when objects physically touch each other, and you can spot them everywhere in your daily life. When you push your desk across the classroom, that's applied force - the most straightforward type where you directly push or pull something.
Friction force is your invisible helper that stops you from slipping and sliding everywhere. It always works against motion, which is why your trainers grip the floor when you walk and why car brakes can stop vehicles safely.
The normal force is like having a personal assistant that supports you constantly. Every time you sit, stand, or place something on a table, surfaces push back with exactly the right amount of force to keep everything stable.
💡 Real-World Connection: Basketball players rely on friction between their shoes and the court to make those quick direction changes during games!

Non-contact forces are like invisible hands that can affect objects without even touching them - pretty amazing when you think about it! The most familiar is gravitational force, which is why your pen falls down instead of floating away when you drop it.
Magnetic force creates some of the coolest effects you'll see. Refrigerator magnets, compass needles pointing north, and even the magnetic strips on your school ID cards all work because of magnetic forces acting across empty space.
Electric force might seem less obvious, but it's working around you constantly. When you get a small shock from touching a metal door handle, or when lightning strikes during storms, that's electric force in action.
💡 Fun Fact: The gravitational force between you and Earth is what creates your weight - it's literally the planet pulling you towards its center!

Sir Isaac Newton figured out three simple rules that explain how forces affect motion, and they're easier to understand than you might think. Newton's First Law (also called the Law of Inertia) explains why you lurch forward when a jeepney suddenly brakes - moving objects want to keep moving!
Newton's Second Law gives us the famous equation F = ma . This tells us that the same push will make a basketball accelerate much faster than a bowling ball - lighter objects are easier to speed up.
The math here is straightforward: if you know any two of the three values (force, mass, acceleration), you can calculate the third. More force means more acceleration, but more mass means less acceleration for the same force.
💡 Memory Trick: Think of pushing a shopping cart - empty carts zoom ahead easily, but full ones need much more effort to get moving at the same speed!

Newton's Third Law states that every action has an equal and opposite reaction - when you walk, you push back on the ground, and it pushes forward on you. Rockets work this way too, pushing hot gases down to get thrust upward.
Understanding balanced and unbalanced forces helps predict what will happen to moving objects. When forces are balanced, objects either stay still or keep moving at the same speed. Your weight pushing down on your chair and the chair pushing up on you are perfectly balanced.
Unbalanced forces create all the interesting action - acceleration, deceleration, and direction changes. When you kick a football, your foot's force is stronger than air resistance, so the ball accelerates toward the goal.
💡 Quick Check: If you're sitting still reading this, the forces on you are balanced. If you suddenly stand up, you've created unbalanced forces!

Transportation across the Philippines showcases forces in action everywhere you look. Jeepneys depend on friction between tyres and roads to start, stop, and navigate those tight corners, whilst engines provide the applied force to overcome resistance.
Tricycles demonstrate how forces create stability - the three wheels distribute weight and forces to prevent tipping over. When climbing hills in places like Baguio, drivers need extra force to fight against both friction and gravity pulling vehicles backward.
Water transport shows buoyant force at work. Bancas float because water pushes up on them with exactly the right force to balance their weight - that's why properly loaded boats don't sink!
💡 Local Connection: Next time you ride a jeepney, notice how you feel the forces when it accelerates, brakes, or turns corners!

Filipino sports perfectly demonstrate force and motion principles. Basketball players use friction force between their shoes and court to accelerate, stop quickly, and change direction. When shooting, the applied force determines the ball's speed and path to the basket.
Swimming shows Newton's Third Law beautifully - swimmers push water backward with their arms and legs (action), and water pushes them forward (reaction). Streamlined body positions reduce water resistance, making movement more efficient.
Sepak takraw players apply different forces using various body parts to control the ball's motion. The ball's path depends on both the force applied and gravity constantly pulling it downward.
💡 Try This: Watch how different sports use forces - notice the grip, the pushes, the pulls, and how objects respond!

Solving force problems using F = ma becomes straightforward with a simple approach. Start by identifying what information you have, determine what you need to find, then substitute values into the equation and solve.
Here's a practical example: A 50-kg student pushes a 20-kg desk with 100 N of force. To find the desk's acceleration, use a = F/m = 100 N ÷ 20 kg = 5 m/s². The desk accelerates at 5 metres per second squared.
When multiple forces act on one object, find the net force first. Forces in the same direction add together, while opposite forces subtract. A car with 3000 N engine force and 500 N friction has a net force of 2500 N forward.
💡 Problem-Solving Tip: Always check if your answer makes sense - a small force shouldn't make a heavy object accelerate incredibly fast!


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.
App 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
Knowunity Philippines
@knowunityphilippines
Ever wondered why you feel pushed back in your seat when a jeepney accelerates, or why it's easier to push an empty shopping cart than a full one? Forces are everywhere around us, constantly pushing and pulling objects to create... Show more

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Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Think of force as nature's way of making things happen - it's simply a push or pull that can make objects speed up, slow down, or change direction. Every step you take, every ball you throw, even just sitting in a chair involves forces at work.
Motion is what happens when forces do their job - it's an object changing its position over time. Your phone falling from your hand, a basketball bouncing, or a tricycle moving down the street are all examples of motion in action.
Here's what makes forces tricky: they're vector quantities, which means they have both strength (how hard you push) and direction (which way you push). A gentle nudge forward is very different from a strong shove backward, even though both are forces!
💡 Quick Tip: Remember that forces always come in pairs - when you sit on a chair, you push down on it, and it pushes back up on you with equal strength!

Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Contact forces happen when objects physically touch each other, and you can spot them everywhere in your daily life. When you push your desk across the classroom, that's applied force - the most straightforward type where you directly push or pull something.
Friction force is your invisible helper that stops you from slipping and sliding everywhere. It always works against motion, which is why your trainers grip the floor when you walk and why car brakes can stop vehicles safely.
The normal force is like having a personal assistant that supports you constantly. Every time you sit, stand, or place something on a table, surfaces push back with exactly the right amount of force to keep everything stable.
💡 Real-World Connection: Basketball players rely on friction between their shoes and the court to make those quick direction changes during games!

Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Non-contact forces are like invisible hands that can affect objects without even touching them - pretty amazing when you think about it! The most familiar is gravitational force, which is why your pen falls down instead of floating away when you drop it.
Magnetic force creates some of the coolest effects you'll see. Refrigerator magnets, compass needles pointing north, and even the magnetic strips on your school ID cards all work because of magnetic forces acting across empty space.
Electric force might seem less obvious, but it's working around you constantly. When you get a small shock from touching a metal door handle, or when lightning strikes during storms, that's electric force in action.
💡 Fun Fact: The gravitational force between you and Earth is what creates your weight - it's literally the planet pulling you towards its center!

Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Sir Isaac Newton figured out three simple rules that explain how forces affect motion, and they're easier to understand than you might think. Newton's First Law (also called the Law of Inertia) explains why you lurch forward when a jeepney suddenly brakes - moving objects want to keep moving!
Newton's Second Law gives us the famous equation F = ma . This tells us that the same push will make a basketball accelerate much faster than a bowling ball - lighter objects are easier to speed up.
The math here is straightforward: if you know any two of the three values (force, mass, acceleration), you can calculate the third. More force means more acceleration, but more mass means less acceleration for the same force.
💡 Memory Trick: Think of pushing a shopping cart - empty carts zoom ahead easily, but full ones need much more effort to get moving at the same speed!

Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Newton's Third Law states that every action has an equal and opposite reaction - when you walk, you push back on the ground, and it pushes forward on you. Rockets work this way too, pushing hot gases down to get thrust upward.
Understanding balanced and unbalanced forces helps predict what will happen to moving objects. When forces are balanced, objects either stay still or keep moving at the same speed. Your weight pushing down on your chair and the chair pushing up on you are perfectly balanced.
Unbalanced forces create all the interesting action - acceleration, deceleration, and direction changes. When you kick a football, your foot's force is stronger than air resistance, so the ball accelerates toward the goal.
💡 Quick Check: If you're sitting still reading this, the forces on you are balanced. If you suddenly stand up, you've created unbalanced forces!

Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Transportation across the Philippines showcases forces in action everywhere you look. Jeepneys depend on friction between tyres and roads to start, stop, and navigate those tight corners, whilst engines provide the applied force to overcome resistance.
Tricycles demonstrate how forces create stability - the three wheels distribute weight and forces to prevent tipping over. When climbing hills in places like Baguio, drivers need extra force to fight against both friction and gravity pulling vehicles backward.
Water transport shows buoyant force at work. Bancas float because water pushes up on them with exactly the right force to balance their weight - that's why properly loaded boats don't sink!
💡 Local Connection: Next time you ride a jeepney, notice how you feel the forces when it accelerates, brakes, or turns corners!

Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Filipino sports perfectly demonstrate force and motion principles. Basketball players use friction force between their shoes and court to accelerate, stop quickly, and change direction. When shooting, the applied force determines the ball's speed and path to the basket.
Swimming shows Newton's Third Law beautifully - swimmers push water backward with their arms and legs (action), and water pushes them forward (reaction). Streamlined body positions reduce water resistance, making movement more efficient.
Sepak takraw players apply different forces using various body parts to control the ball's motion. The ball's path depends on both the force applied and gravity constantly pulling it downward.
💡 Try This: Watch how different sports use forces - notice the grip, the pushes, the pulls, and how objects respond!

Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Solving force problems using F = ma becomes straightforward with a simple approach. Start by identifying what information you have, determine what you need to find, then substitute values into the equation and solve.
Here's a practical example: A 50-kg student pushes a 20-kg desk with 100 N of force. To find the desk's acceleration, use a = F/m = 100 N ÷ 20 kg = 5 m/s². The desk accelerates at 5 metres per second squared.
When multiple forces act on one object, find the net force first. Forces in the same direction add together, while opposite forces subtract. A car with 3000 N engine force and 500 N friction has a net force of 2500 N forward.
💡 Problem-Solving Tip: Always check if your answer makes sense - a small force shouldn't make a heavy object accelerate incredibly fast!

Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy

Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
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.
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Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
App 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