Question

it is difficult to write with chalk on a smooth black board what is the reason for this​

Answer 1

Answer:

Because of friction or frictional force

Explanation:

when chock is slided on black board then it creates frictional force & because of frictional force it goes hard to write

Answer 2

it is difficult to write with chalk on a smooth black board what is the reason for this​?

It is difficult to write with chalk on any smooth board because when the board is smooth, the friction between the chalk and the board is not sufficient.

For chalk to leave marks on the board, the board must be rough so that the chalk marks are left on the board due to friction.

When the board is smooth, the chalk does not get enough friction to leave its mark, so it is not possible to write with chalk on a smooth board. To write on a board with any chalk, the surface of the board must have rough. Due to this friction, the chalk is scraped and its particles are left on the board, which take the shape of the letter.

If we try to write with chalk on a smooth board, then due to lack of friction, the chalk particles will not be able to stick on the board and we will not be able to write anything, that is why it is difficult to write with chalk on a smooth black board.

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