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Explain how a thumbtack is designed so that you do not have to use a lot of force to push it through paper or the surface of a bulletin board?
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Explain how a thumbtack is designed so that you do not have to use a lot of force to push it through paper or the surface of a bulletin board?

User Kylar
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Thumbtacks have a flat top which gives you a bigger area to push on, and the end is tapered and sharp to make it easier to push it into a wall, etc.
User Dennis Guse
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