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Year 5 look at simple mechanisms in ‘Forces’

Year 5 look at simple mechanisms in ‘Forces’

Our Forces topic is just coming to a close and we are looking at some simple mechanisms.  While at Ironbridge we saw the ‘Hay Inclined Plane’ a mechanism that lifted and lowered boats 63m using a combination of steam power and gravity; in the classroom we have been working with even simpler mechanisms - levers and pulleys.

The children were given a tray of resources and instructions to build 2, 3 and 4 pulley systems.  Using Newtonmeters and string, we could measure the advantage of using pulleys to lift heavy weights - did you know that with 4 pulleys, the load feels only a quarter of its weight?  You do need 4 times the length of string to raise it though!  

It was great fun finding this out.

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