Sand paper or glass paper is a heavy paper with abrasive material attached to its surface which makes it very rough. Due to its roughness, it has many uses like making surfaces smoother, removing materials from the surfaces etc. What happens when you keep increasing the roughness of the sand paper’s surface?
a) Friction of the surface increases continuously
b) Friction of the surface decreases continuously.
c) Friction of the surface increases initially and then decreases.
d) Friction of the surface decreases initially and then increases
Answers
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Answer:
Explanation: option (a) is correct because in smoother surface there is more friction
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Answer:
The roughness of the sand paper’s surface which about "initial increase and later decrease".
Explanation:
- The Sandpaper has very small granules are particles attached to its surface which causes the Sandpaper to become course for uneven and hence it results in friction on its surface.
- When this friction needs to be increased then the number of granules has to be increased and when the number of granules increases.
- Since there are more new surfaces formed the friction initially increases but since the load is divided on so many heads gradually friction decreases.
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