Question

why do tools meant for cutting always have sharp edges​

Answer 1

Answer:

As these edges are sharp there is increased surface area

Explanation:

When the tool will be sharp it means that the surface area reduces thus, in this way more force can be applied on an object and it can be cut easily and quickly.

Answer 2

Explanation:

because less surface area more thrust or pressure

so if it is pointed less force is required to cut objects