Why do needles and pins have pointed tip?
Asked by Topperlearning User | 5th Feb, 2015, 05:24: PM
Pressure is inversely proportional to area. A pointed tip will have a very small area. So, when we try to sew or pin up the papers, we apply force over a very small area, and this results in a large pressure. This makes it easy to sew or pin up the papers.
Answered by | 5th Feb, 2015, 07:24: PM
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