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Q.

Which of the following situations is not an application of pressure?

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a

Porters put a thick round piece of cloth on the head to carry heavy loads.

b

A sharp iron nail is inserted into a wall easily.

c

An apple falls on the ground.

d

Straps of school bags are made wider.

answer is C.

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Detailed Solution

  • Pressure is defined as the perpendicular force exerted per unit area. It is inversely proportional to the area.
  • Porters put a thick round piece of cloth on the head while carrying heavy loads to distribute the force on a larger area and reduce the pressure.
  • A sharp iron nail is inserted into a wall easily because the applied force is concentrated on a small tip which results in higher pressure.
  • Straps of school bags are made wider to distribute the force on a larger area and reduce the pressure.
  • Apple falls on the ground due to gravitational force.

Therefore, we can say that the falling of an apple on the ground is not an application of pressure.

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