Question

Assertion- sharp knives are used to cut vegetables.
Reason- sharp edges exert more pressure as they have less surface area

Answer 1

Answer:

both assertion and reason are correct

Explanation:

the reason is correct explanation of the assertion

Answer 2

$\bigstar \: \rm\pink {Solution :-}$

(a) Both assertion and reason are true and reason is the correct explanation of assertion.

________________________________

$\bigstar \: \rm\red {Assertion :-}$

Sharp knives are used to cut vegetables.

$\bigstar \: \rm\purple{Reason :-}$

Sharp edges exert more pressure as they have less surface area.

Explanation :-

We know that, pressure is inversely proportional to area. That is the more the area the less the pressure. And we also know that, to cut vegetables or any thing we need to apply great amount of pressure. Therefore, the sharp edges knives, with less area are used instead of blunt knives having more area comparatively.

Know more :-

✯ Pressure is inversely proportional to area and directly proportional to force. Therefore, by the definition, we can derive the formula of pressure as :-

$\boxed{ \orange\bigstar \: \sf \pink{Pressure = \frac{Force}{area} }}$

✯ S.I. unit of pressure is Pascal denoted by alphabet "P". Instead of pascal, we can also use N/m² as its unit.