Friction and Drag - GCSE Physics

This video introduces friction and drag, two contact forces. Friction and drag (also called air resistance or water resistance) can be explained with the particle model. These contact forces act between objects and can be both useful (like when a bike's tyres are gripping) or not so useful (like air resistance slowing you down).
Friction acts between two solids whereas drag acts between a solid and a fluid. We can reduce friction by lubricating the two objects which slightly separates them, allowing the two surfaces to glide more smoothly over each other. We can reduce drag by streamlining the solid object which reduces collisions with air or water particles, allowing the object to move more smoothly through the fluid.
Thanks for watching,
Lewis
Relevant for GCSE Physics 9-1 in the following exam boards:
AQA (including Trilogy)
Edexcel
CCEA
OCR A
OCR B
WJEC
CIE (Cambridge International Examinations) IGCSE
Edexcel International IGCSE
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[@zoeevans946]

Thank you, particles are very interesting. I love when you use Lego to show the concept that your talking about really helps understanding it more ! Also thank you so much for posting videos every day, I love coming home from school and watching your videos. So thank you for all your hard work! 👍🏻

[@PhysicsOnline]

My pleasure, over two hundred more GCSE videos to go still!

[@traceyjadebrown3333]

This is sooo boring 🙄🙄🙄

[@mariehill6547]

Hi, I have a physics related question, which is, why is it that if the angular velocity increases the time period increase (this was stated in a mark scheme)?

[@ganden9793]

Angular velocity is the circumference of the circle that the object is moving in divided by the period (which is the time taken for one full revolution). So for the same circumference, if the period decreases the angular velocity must increase. The mark scheme sounds wrong...

[@mariehill6547]

Ganden yeah that’s the exact logic that I was thinking but I’ll have to confirm with my teacher! Thank you so much!

[@keshninundlaul1769]

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Plzz a video would have been really helpful

[@budandbuddy9320]

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