Then I did MATHS with Mr Barton. It was decimals - urgh! Death by decimals again!! Will it ever end? It was quite easy to do.
I then did the RE lesson with Miss Reid. This was on why Buddhists meditate. I like the RE lessons. We then did some meditation and it did make me feel sleepy so I think I will do this at night. My mum says she will do it in the morning to keep her calm and to stop her craving crisps and chocolate!

AIR RESISTANCE is a form of friction. This is a good video which explains it.
I tested this by taking two exact pieces of paper with the same mass. I scrunched one into a ball. When I dropped them the one scrunched up dropped quicker. This is because there was less air resistance. It had a more streamlined shape.
I then researched how important this was in skiiing. I looked at lots of videos about how how skiers going downhill go in a crouched position so they go faster. They also have equipment to make them go faster such as bent poles which they hold close to their bodies, specially designed helmets and ski suits which are tested in wind tunnels! Professional skiers will also try to keep their skis pointed down the slope and parallel. They may also wax their skis so there is less friction with the snow. I labelled the pictures to show how the bottom skier will be much quicker.
Welcome back Seren! I've missed your blog. Love watching your experiments and particularly enjoyed the video on wind resistance. Very interesting.
ReplyDeleteNana. X