A piece of chalk wears out as it is used on a black board.Give reason
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Answered by
46
Hello friend,
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.
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.
arhaanjha:
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Answered by
24
due to friction and atmospheric pressure a piece of chalk wears out as it is used on a blackboard.if it helps you please mark it as brainiest
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