Activity 1 – Order the surfaces – How much friction do they produce? Activity 2 – Moving things quiz Activity 3 – Solve this problem Activity 4 – Conduct an investigation We need forces to make things ...
See all the objects from the Radio 4 series A History of the World in 100 Objects. Click on any link to find out more about an object, zoom in on the image and listen again or download the programme.
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