## Nat5 dynamics & space revision notes

Here is a set of revision notes to help you prepare for the upcoming dynamics & space unit assessment.  Ignore any references to specific heat capacity on pages 49 & 50 –  we’ll cover that in another unit and it won’t be in your D&S test.

Thanks to Mr Noble for sharing his notes 🙂

## satellites

Satellites are similar to the horizontally launched projectiles we looked at last week.  A satellite moves horizontally at constant speed but also accelerates vertically towards the planet’s surface due to gravity.  Thankfully, the curvature of the Earth means the satellite doesn’t crash but keeps on orbiting the planet.

According to SQA, National 5 candidates need to know about the

## Impact of space exploration on our understanding of planet Earth, including use of satellites.

So far this week, we have covered many applications in which satellites are used to study our planet.  Examples include;

## Nat5 – solutions to scalar/vector hw exercise

Here are your solutions to the homework questions on scalar and vector quantities.  Check your own work against these answers and let me know if you need any further explanation to reach the answers shown.

## National 5 sample Dynamics & Space exam questions

Here are some questions from the old Standard Grade and Intermediate 2 exams that fit the dynamics and space unit of National 5 Physics.  I will provide solutions in the next post.

## national 5 exam questions – dynamics and space

Here are the exam questions for the Dynamics and Space.  I have included a copy of the data sheet inside the front cover, you might need it for some of these questions.  A set of solutions will follow shortly.

## the challenge of mars

“We choose to go to the Moon in this decade and do the other things, not because they are easy, but because they are hard.” – President John F. Kennedy (12th September, 1962)

It’s 45 years since the success of Apollo 11 and nobody has tried to send a person further away than the Moon.  Why is that?

It turns out there are many challenges to be overcome if we want to send astronauts to another planet, e.g. Mars.  Earlier this year, the BBC Horizon programme looked at the issues.  Here is the episode. I have split the film into three parts.

Use the link at the end of this post if you want to download a copy to watch later.

## national 5 – satellites

We’ve started looking at telescopes and this BBC programme from 2 years ago featured the replacement for Hubble, the James Webb Space Telescope.  The presenter, Maggie Aderin Pocock now hosts The Sky at Night on BBC4.

Please take some time to watch both parts of the film.  Maggie covers the basic idea of satellites, how we achieve geostationary orbit, looks at examples of Earth observation and the manufacture of the James Webb’s massive 6.5m mirror.  In part 1, around 17 minutes in, you’ll see satellite footage over the Highlands, can’t quite see Thurso though.