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1. A local
florist has asked you to design a model to be placed next to the
checkout. The mechanism (shown opposite) is nearly complete but a simple
mechanism needs adding. The mechanism must make the characters arm move
up and down in a fairly smooth movement.
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2. A museum has
asked you to design a model to be placed at the entrance. The mechanism
is based on an executioner (shown opposite) and is nearly complete. The
mechanism must make the characters arm move up slowly and drop down
quickly.
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3. A local toy
shop has asked you to design a model to encourage parents to buy their
young children mechanical toys. The partially made model is seen
opposite. Add a suitable cam that controls two followers so that they
rise and fall.
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4. A local
company has asked you to complete a mechanical toy by adding suitable
cams. The partially made model is seen opposite. The flat followers rise
and fall smoothly and at an uniform speed as the handle is turned and
the shaft rotates.
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5. In the space below design device that shows pupils how a range of cams work. The
device has a central shaft the rotates when a handle is turned. |
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