Ductile and Brittle Materials – A Level Physics

Published on April 2, 2015 by

A short video that explain the various material properties you need to understand and identify from a stress-strain graph. From brittle substances like glass and a Crunchie to the plastic deformation of copper and a Mars bar.

Thanks for watching,



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  • Syed Ahmed 8 years ago

    Hey these videos are very helpful! I was wondering whether you are planning to do any electricity videos? 

    • Physics Online 8 years ago

      @Syed Ahmed I am planning to, I’ve just not had time yet, they will be on here soon.

  • Hyde 7 years ago

    Excellent video! Any plans on doing A2? All these videos are from AS level. Thanks again. Looking forward to it.

  • pinkheart91 7 years ago

    Hi, can you please make playlists for AS and A2?

  • Amitesh Nagarkar 7 years ago

    Just discovered this channel, have learned and UNDERSTANDed so many concepts so far – its only been 20 mins. OCR A 2015 Physics is hopefully not going to cause me problems, as long as you are here! Thank you!

    • Physics Online 7 years ago

      +Amitesh Nagarkar Glad to hear it! Hope it all goes well for you.

  • Guy Riese 7 years ago

    This is the best way of teaching Ductile and Brittle Materials I’ve ever seen – awesome vid!

    • Physics Online 7 years ago

      +Guy Riese Thanks. I find it’s hard to imagine metals as ductile since in everyday life they seem so hard. But everyone knows about sweets.

  • Mahmzo 6 years ago

    Would it be possible for you to do an online revision session the weekend before our depth/breadth exam? perhaps for an hour or so. I think there are a few websites where you can stream you computer while allowing us in the chat to ask questions. That would amazing last minute revision!

    • Physics Online 6 years ago

      I couldn’t get it to work last time – I’ll have another look this evening.

    • Callum Atwal 6 years ago

      I can help if you like, I’ve done some live streaming before

    • Physics Online 6 years ago

      Email me at contact@alevelphysicsonline.com with a few more details.

    • Ang badang 6 years ago

      This needs to happen.

    • F1rools22 5 years ago

      A Level Physics Online did this ever happen?

  • Zoraiz Qureshi 6 years ago

    Ahh. The hunger pangs are getting stronger now. Classic explanation though! *-*

  • Mo Leily 6 years ago

    Thank you so much it’s was very useful

  • LJ2190 6 years ago

    If you exchange the chocolate for materials which showed similar lines, which would be most suitable for a) a lift cable? And b) a bungee jump?

  • Ang badang 6 years ago

    This is by far your worst video in my opinion, I am trying to cram for an exam and all I want is a Crunchie haha

    • lowkeylean 6 years ago

      Ang badang i dont think this is for last minute study….its only for the basic understanding

    • Ang badang 6 years ago

      @Castillo Dazš It was more of a last minute reminder of basic principles. The exam was only A level which isn’t too in depth on everything as it tries to cover a lot.

  • Nav Raja 6 years ago

    Arnt you going to do a video on springs in series or parallel?

    • Physics Online 6 years ago

      I don’t think I’ve done this – but that is a tricky area (and useful when you also consider resistors and capacitors in parallel). Very good idea.

  • Amara Mansoor 5 years ago


  • Sticknado 5 years ago

    And that kids is why Mars bars>Crunchie bars

  • marc manley 5 years ago

    Real things like metal ? dont disrespect wham bars like that man

  • Hrithik George 5 years ago

    Whenever possible, I’ll try and do this experiment. You know… for repetitive quality testing purposes.

    I’ll need the gym now…

  • Navid Mohammadzadeh 5 years ago

    I like it. Thanks

  • Erick Carvalho Campos 5 years ago

    Brilliant video! I like the simple way you figure it out to explain the concepts.

  • ORLOGSKAPTEIN A 5 years ago

    Children in Africa could’ve eated that wire

  • daniyal warraich 5 years ago

    Thankyou !

  • Trve Kvlt 4 years ago

    Stop with the food analogies! You are making us all hungry

  • GD_Mantesh 4 years ago

    u great mate! cz when u do experiment we learn easily than speaking too much .. Thanks for this vid

  • Iamyou iamyou 4 years ago

    i watch this video while fasting in ramadan, crunchies are also my favourite

  • Pong 4 years ago

    damn youre good at this

  • Adilwani6159 Wani 4 years ago

    Great one ,

  • DoG TooTH 4 years ago

    Came here to solve physics problems. Made me to go to the store and buy some crunchies.

  • Sunny kim 4 years ago

    Uve just made me hungry

  • Uma Kumaravel 4 years ago

    ASMR to its finest! Great video!

  • IAET 4 years ago


  • Skywalker 3 years ago

    neat examples & explanation! i don’t go here (physics), but i got it super fast thanks to you!

  • Haider's Tech 3 years ago

    That was a very good video, Thanks a lot 💓💓

  • Benchley Banawag 3 years ago

    Simple demonstration and yet verry understandable

  • Spyroxin 3 years ago

    A brief video, totally to the point without any room for boredom. Simply amazing.

    • Physics Online 3 years ago

      Thanks. I try to keep it simple while still covering everything you need to know.

  • Sabrina Islam 3 years ago

    I just got a kitkat ad

  • Elite a20 3 years ago

    How can you find out if a material is tough or strong from the graph?

  • EmilySB 2 years ago

    I came here to learn. I left here hungry.

  • MReza Tahan 2 years ago

    I enjoyed the simple illustration. Good job!

Comments are closed.