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The diagram below illustrations of devices used to do work easily.
Study the diagram carefully and answer the questions that follow.
i)
Give a general name for the devices.
ii)
Identify each of the devices labelled A, B, C and D.
iii)
Name the parts labelled I, II and III of device A when it is considered as a lever.
iv)
What does the arrow represent in the device labelled B?
v)
Name the type of work done with each of the device labelled:
α)
C;
β)
D.
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