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Forces - levers, pulleys and gears

To finish our forces unit, in the next couple of weeks, you will be learning about forces using levers, pulleys and gears. All of the work for this part of the unit will be from videos, experiments and quizzes. I've laid out an order of sessions to help you organise your time for this science learning. Be prepared for a quiz next week which will test your understanding of levers, pulleys and gears so watch this space!

 

Session 1: Look at the Powerpoint, then watch the videos in links below to help you get a better understanding of levers, pulleys and gears. Some of the videos have been filmed in America, so some of the words may be pronounced a little different but bear with this, as their is some good information about the sciences of levers and pulleys. 


Once you've watched the videos -  search you house to investigate all of the different types of levers, pulleys and gears you can find. Let's have a bit of a competition to see who can list the most by recording the simple machines you find (and any pictures if you can) in A word document. Remember to name the item then write next to it whether it is a lever, pulley or gear. Just copy and paste the document into another word doc and start recording away.

 

https://www.bbc.co.uk/bitesize/clips/zrp6n39 - Watch to understand levers and pneumatic force in everyday life. Can you create your own tug of war at home?
https://m.youtube.com/watch?v=rFQR996cxck - A moment is used in all simple machines so this video helps to explain moments and how that links to gears. Please do not worry about calculating the size of the force as this is quite complicated by if you like a challenge, give it a go. 
https://m.youtube.com/watch?v=lueqE0lxLyc - A video which explains levers with great diagrams. 
https://m.youtube.com/watch?v=Nj4J7QNeBNk - A video which explains pulleys with great diagrams. 


This video has some more complicated vocabulary:
https://m.youtube.com/watch?v=YlYEi0PgG1g - This video is an extra one which links maths and history to how levers work. Feel free to watch this but it does use some complicated vocabulary at times. 

 

Key vocabulary to decode the videos:
Fulcrum = a fixed point which is placed underneath something to make a lever move an object. It's like a higne or pivot
Moment = turning force of an object. It depends on the size of the force and distance it is from the pivot/fulcrum
Exerted = apply force to something
Transmitted = pass one thing to another


Session 2: Levers experiment! It's time to get your science brains in gear (couldn't resist the joke) and get creative by creating your own levers experiment. Task 1 explains the experiment instructions and a document to record your data. Task 2 helps you to conclude your findings and deepen your understanding of levers. This will be assigned to you and you'll need to turn it in.

 

Session 3: Pulleys and Gears worksheets - complete the sheets when they are uploaded to deepen your understanding of these simple machines.

 

Enjoy! :)

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