Question

The Blade of a scissors must be sharped to cut a
cloth or paper easily why give reason

Answer 1

Because pressure will be maximum as surface area decreases.
And force exert will be maximum..

Answer 2

blade of the season must be sharp to cut the clothes or papers because the sharp thing's molecules apply a force that pushes the other material's molecules apart. The force applied by the sharp thing's molecules is greater than the force holding the other molecules together, so they separate.