Question

a knife has sharp edges. give reason ​

Answer 1

Answer:

a knife have sharp edges because you need to cut something from it

Answer 2

Explanation:

We know,

$p = \frac{f}{a}$

where p = pressure, f= force, a = area.

Since, surface area of the sharp edge of knife is less, so pressure due to applied force is greater.

Hence, edge of knives are made sharp.

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