why is it possible to write on a rough blackboard with chalk?
Answers
Answered by
25
Answer:
due to frictional force
Explanation:
some irregularities are present on a rough surface,and due to this some molecules/tiny particals of chalk get deposited there
Answered by
18
The friction between the chalk and the rough surface is what allows the chalk to leave behind the chalk dust that we see. Therefore, it impossible to write on a theoretically smooth blackboard.
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