a)
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Below are a number of simple machines which people use every day. Draw a line to match the type of simple machine to the machine that is used by people. (One of the machines used by people is not needed.)
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b) | Ian needs to move a large rock to the middle of his garden. He is going to use a metal bar and a block of wood as a lever to move this rock. He has a choice of 3 metal bars and a block of wood. The bars are exactly the same except for how long they are. The lengths are 1/2 m, 1 m, 1 1/2 m, and 2 m. | |||||||||||||||||||||||||||||||
i) |
Which metal bar should he choose to use? (circle one)
(A) 1/2 m (B) 1 m (C) 1 1/2 m (D) 2 m |
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ii) |
Draw in the box below how he would set up the metal bar and block of wood to move the rock.
Metal bar
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