Hmotnosť stretávaš každý deň - keď si kupuješ jedlo, keď... Show more
Fyzika
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Angličtina
MatematikaSign up to see the contentIt's free!
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Updated Mar 24, 2026
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Ako správne merať hmotnosť: Základy a tipy
1 / 5
Úvod k meraniu hmotnosti
Hmotnosť je vlastnosť každého predmetu okolo teba. Jednoducho povedané, hovorí ti, koľko "veci" alebo materiálu je v nejakom telese. Čím viac látky, tým väčšia hmotnosť.
Na meranie hmotnosti používame váhy - osobné, kuchynské alebo obchodné. Určite si ich už videl v akcii! Základné jednotky sú gram (g) pre ľahké veci ako cukríky, kilogram (kg) pre ťažšie veci ako ľudia, a tona (t) pre veľmi ťažké veci ako autá.
Pozor! Hmotnosť nie je to isté ako váha! Hmotnosť je množstvo látky, váha je sila. V bežnom živote však často hovoríme "koľko vážiš?", ale myslíme tím "akú máš hmotnosť?".
Kľúčové pojmy a meranie
Existuje veľa typov váh pre rôzne účely. Osobná váha je doma na váženie ľudí, kuchynská váha slúži na váženie potravín, a obchodnú váhu vidíš pri nakupovaní ovocia.
Keď meriáš hmotnosť, vždy musíš dávať pozor, aby váha bola presná a aby si ju používal správne. Rôzne veci potrebujú rôznu presnosť - na lieky treba veľmi presné váhy, na zemiaky stačí menej presná.
Základná jednotka hmotnosti je kilogram (kg). Táto jednotka je základ pre všetky ostatné premeny, ktoré budeš potrebovať.
Tip! Skús si predstaviť, koľko asi váži 1 kg cukru alebo 100 g čokolády. Pomôže ti to pri riešení úloh!
Jednotky hmotnosti a premeny
Tu sú tri hlavné jednotky a ich použitie:
- Gram (g) - cukrík, ceruzka, korenie
- Kilogram (kg) - človek, batoh, vrece zemiakov
- Tona (t) - auto, nákladné auto, slon
Dôležité premeny, ktoré musíš vedieť nazpamäť:
- 1 kg = 1000 g
- 1 t = 1000 kg
- 1 g = 0,001 kg
Ako prevádzať jednotky? Z väčšej na menšiu násobíš . Z menšej na väčšiu delíš .
Nezabudni! Vždy si najprv skontroluj jednotky! Pred počítaním sa uisti, že všetky hmotnosti sú v rovnakých jednotkách.
Riešené príklady
Príklad 1: Balíček cukríkov váži 250 g. Koľko je to kilogramov? Riešenie: 250 g ÷ 1000 = 0,25 kg
Príklad 2: Mama kúpila 3 kg jabĺk. Koľko je to gramov?
Riešenie: 3 kg × 1000 = 3000 g
Príklad 3: Na koláč potrebuješ 500 g múky a 0,2 kg cukru. Aká je celková hmotnosť v gramoch? Riešenie: Najprv preveď cukor: 0,2 kg × 1000 = 200 g. Potom sčítaj: 500 g + 200 g = 700 g.
Vidíš? Nie je to také ťažké! Kľúčom k úspechu je postupné riešenie a kontrola jednotiek.
Rada! Pri zložitejších úlohách si najprv napíš, čo máš dané a čo hľadáš. Potom postupuj krok za krokom.
Zhrnutie a tipy na test
Najdôležitejšie veci na zapamätanie:
- Hmotnosť = množstvo látky v telese
- Základná jednotka: kilogram (kg)
- Premeny: 1 kg = 1000 g, 1 t = 1000 kg
- Hmotnosť ≠ váha (hmotnosť je látka, váha je sila)
Tipy na úspech: Vždy kontroluj jednotky pred počítaním. Ak nie sú rovnaké, najprv ich preveď. Odhad ti pomôže skontrolovať, či je výsledok rozumný.
Presnosť záleží na účele - lieky potrebujú presné váhy, zemiaky nie. Toto ťa už nikdy nezaskočí na teste!
Pamätaj si! Postupné riešenie a kontrola jednotiek sú tvoje najlepšie kamarátky pri počítaní s hmotnosťou.
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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.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
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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 Knowunity AI. 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 Knowunity AI. 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
Ako správne merať hmotnosť: Základy a tipy
Hmotnosť stretávaš každý deň - keď si kupuješ jedlo, keď sa vážiš, alebo keď mama pečie koláč. Je to jedna zo základných vecí vo fyzike, ktorú musíš vedieť merať a s ktorou musíš vedieť počítať.
Úvod k meraniu hmotnosti
Hmotnosť je vlastnosť každého predmetu okolo teba. Jednoducho povedané, hovorí ti, koľko "veci" alebo materiálu je v nejakom telese. Čím viac látky, tým väčšia hmotnosť.
Na meranie hmotnosti používame váhy - osobné, kuchynské alebo obchodné. Určite si ich už videl v akcii! Základné jednotky sú gram (g) pre ľahké veci ako cukríky, kilogram (kg) pre ťažšie veci ako ľudia, a tona (t) pre veľmi ťažké veci ako autá.
Pozor! Hmotnosť nie je to isté ako váha! Hmotnosť je množstvo látky, váha je sila. V bežnom živote však často hovoríme "koľko vážiš?", ale myslíme tím "akú máš hmotnosť?".
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Kľúčové pojmy a meranie
Existuje veľa typov váh pre rôzne účely. Osobná váha je doma na váženie ľudí, kuchynská váha slúži na váženie potravín, a obchodnú váhu vidíš pri nakupovaní ovocia.
Keď meriáš hmotnosť, vždy musíš dávať pozor, aby váha bola presná a aby si ju používal správne. Rôzne veci potrebujú rôznu presnosť - na lieky treba veľmi presné váhy, na zemiaky stačí menej presná.
Základná jednotka hmotnosti je kilogram (kg). Táto jednotka je základ pre všetky ostatné premeny, ktoré budeš potrebovať.
Tip! Skús si predstaviť, koľko asi váži 1 kg cukru alebo 100 g čokolády. Pomôže ti to pri riešení úloh!
Sign up to see the contentIt's free!
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Jednotky hmotnosti a premeny
Tu sú tri hlavné jednotky a ich použitie:
- Gram (g) - cukrík, ceruzka, korenie
- Kilogram (kg) - človek, batoh, vrece zemiakov
- Tona (t) - auto, nákladné auto, slon
Dôležité premeny, ktoré musíš vedieť nazpamäť:
- 1 kg = 1000 g
- 1 t = 1000 kg
- 1 g = 0,001 kg
Ako prevádzať jednotky? Z väčšej na menšiu násobíš . Z menšej na väčšiu delíš .
Nezabudni! Vždy si najprv skontroluj jednotky! Pred počítaním sa uisti, že všetky hmotnosti sú v rovnakých jednotkách.
Sign up to see the contentIt's free!
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Riešené príklady
Príklad 1: Balíček cukríkov váži 250 g. Koľko je to kilogramov? Riešenie: 250 g ÷ 1000 = 0,25 kg
Príklad 2: Mama kúpila 3 kg jabĺk. Koľko je to gramov?
Riešenie: 3 kg × 1000 = 3000 g
Príklad 3: Na koláč potrebuješ 500 g múky a 0,2 kg cukru. Aká je celková hmotnosť v gramoch? Riešenie: Najprv preveď cukor: 0,2 kg × 1000 = 200 g. Potom sčítaj: 500 g + 200 g = 700 g.
Vidíš? Nie je to také ťažké! Kľúčom k úspechu je postupné riešenie a kontrola jednotiek.
Rada! Pri zložitejších úlohách si najprv napíš, čo máš dané a čo hľadáš. Potom postupuj krok za krokom.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Zhrnutie a tipy na test
Najdôležitejšie veci na zapamätanie:
- Hmotnosť = množstvo látky v telese
- Základná jednotka: kilogram (kg)
- Premeny: 1 kg = 1000 g, 1 t = 1000 kg
- Hmotnosť ≠ váha (hmotnosť je látka, váha je sila)
Tipy na úspech: Vždy kontroluj jednotky pred počítaním. Ak nie sú rovnaké, najprv ich preveď. Odhad ti pomôže skontrolovať, či je výsledok rozumný.
Presnosť záleží na účele - lieky potrebujú presné váhy, zemiaky nie. Toto ťa už nikdy nezaskočí na teste!
Pamätaj si! Postupné riešenie a kontrola jednotiek sú tvoje najlepšie kamarátky pri počítaní s hmotnosťou.
We thought you’d never ask...
What is the Knowunity AI companion?
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.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
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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4.6/5
App Store
4.7/5
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 Knowunity AI. 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 Knowunity AI. 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