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 ... Read more

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

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

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!

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

Here are the answers to the waves & radiation questions.

I’ve attached a short guide to half-life calculations.  There are some questions after each worked example, answers are at the end of the sheet.

Here are the solutions to the Electricity & Energy questions.  Mark allocations are highlighted in red.

Here are the revision questions for dynamics and space.  They are taken from old standard grade and intermedite 2 past papers.  I have adjusted the marks to fit national 5.

Here are the solutions to the dynamics & space questions.  I have adjusted the marking instructions to reflect the way national 5 is marked.