We’ve been looking at forces for the past two weeks. Here are some notes and videos to help you learn more about this topic.
Newton’s 1st Law
animation showing effects of air resistance
Friction: here are 3 clips about friction from the BBC programme Bang goes the Theory
//www.youtube.com/watch?v=qhpXnGaYmdA
//www.youtube.com/watch?v=XNOEP1XIFiM
and look what happens when cold weather removes the friction that helps you to control your car!
//www.youtube.com/watch?v=7MPRmOUxRMY
Here are some videos on balanced and unbalanced forces affecting the motion of objects. The first clip examines the forces on a cyclist as she cycles round a velodrome.
//www.youtube.com/watch?v=WoTQDrzCqb0
The second clip looks at the way skydivers use forces to land safely.
//www.youtube.com/watch?v=io-6uYOQK6A
Newton’s 2nd law
Newton’s 3rd law
I’ve written a blog post on Newton’s third law during a rocket launch that shows Newton’s 3rd law very clearly. There’s also a follow-up post on Newton’s third law with footage of the Apollo 11 rockets destroying the launch pad.
If you’ve read all that stuff on forces, take a break to watch the Glesga Physics Newton’s Laws video
httpv://www.youtube.com/watch?v=OCnLcq3LBEg
2 Sept 2019
x-rays
X-rays are a form of electromagnetic radiation. They have a much higher frequency than visible light or ultraviolet. The diagram below, taken from Wikipedia, shows where x-rays sit in the electromagnetic spectrum. image by Materialscientist Wilhelm Röntgen discovered x-rays and the image below is the first x-ray image ever taken. It shows Mrs. Röntgen’s hand and wedding ring. ... Read more
30 Aug 2018
how to do half-life questions
We started looking at half-life today. The attached file walks you through different types of half-life problem. There are some questions for you to try along they way. The answers are at the end, please don’t cheat!
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