We talked about how Galileo dropped a cannon ball and a wooden ball from the leaning tower of Pisa to show that all objects experience the same force on Earth due to gravity. Both objects land at the same time, but if you were to drop a ball and a feather then the feather would experience more air resistance than the ball and take longer to fall. If you go somewhere there is no air – a vacuum or on the moon then both objects fall at the same speed. These is proved in the video. Check it out.

ps. this has been a sats question in the past

You can download a more recent sats paper here  as a word document -apologies that it’s still level 3-6. I have a software problem that I need to get sorted out

To get a distinction in your latest Btec assignment, one thing you need to do is explain the effects of the 3 types of radioactivity. Watch this video clip very closely, as it has all the information you need.