Question

A piece of chalk wears out as it is used on a blackboard

Answer 1

↕↕Here ur Answers ↕↕

With every stroke of the chalk piece it leaves some of the chalk on the board.This abrasion of the piece of chalk causes it to wear down.This is because of frictional force.

___✘‿✘___

♔Azhar♔

Answer 2

Answer:

Please explain this question

Explanation:

I definitely give you answer❤❤