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Question

A winding staircase is an example of …………….


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Solution

  1. A winding inclined plane is called a screw.
  2. It appears like a nail with grooves on its circular surface.
  3. By cutting the spiral grooves on the surface of a metal rod a screw is made.
  4. The spiral grooves so formed are known as the threads of the screw.
    Hence, A winding staircase is an example of screw

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