Question

Mention two cases in which it is useful to
decrease the pressure exerted by a force and
two cases in which it is useful to increase the
pressure exerted by a force,​

Answer 1

Question:

Mention two cases in which it is useful to

decrease the pressure exerted by a force and

two cases in which it is useful to increase the

pressure exerted by a force?

AnsweR:

Two cases in which it is useful to decrease the pressure exerted by a force are following:

• Knifes are sharpened to increase pressure or apply maximum pressure with less force.

• Nails have pointed ends to increase pressure by minimising the surface area.

Two cases in which it is useful to increase the pressure exerted by a force are following:

• the tractors have broad tyres so that there is less pressure on the ground and tyres don not sink into soft grounds.

• School bag have wider straps so that the heavy weight may fall on the large area of the shoulder.

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Additional Information:

What is the Pressure?

Pressure is the amount of force exerted over a unit of area.

• P = F/A
• Pressure = Force divided by Area

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Hope it will be helpful :) ......✍️

Answer 2

Answer:

Useful to decrease pressure

(1) Snow boots have large surface area to minimize pressure.

(2) When you hang bag in two shoulder it feels lighter than when you having it in one hand.

Useful to increase pressure

(1) Nails have pointed ends to increase pressure by minimizing surface area.

(2) Knifes are sharpened to increase pressure or apply maximum pressure with less force.