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Pressure Exerted by Solids

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Questions and Answers

What is the reason why the sharp pin pierces the board, but the flat pin does not?

The board is softer at the point where the sharp pin is pressed.

The force applied is greater in the sharp pin.

The material of the pins is different.

The area of contact between the tip of the pin and the board is smaller in the sharp pin. (correct)

Pressure is inversely proportional to the force.

False

What is the formula to calculate pressure?

Pressure = Force / Area on which the force is applied

The SI unit of pressure is _______________.

N/m² or pascal (Pa) Signup and view all the answers

Match the following quantities with their SI units:

Force = Newton (N) Area = m² Pressure = N/m² or pascal (Pa) Signup and view all the answers

What happens to the pressure when the area of contact increases?

It decreases. Signup and view all the answers

1 N/m² is equal to 1 Pa.

True Signup and view all the answers

Why is the effectiveness of the applied force different in the cases of the sharp and flat pins?

Because the area of contact between the tip of the pins and the board is different. Signup and view all the answers

Pressure is defined as the force exerted _______________ on a unit area.

perpendicularly Signup and view all the answers

Study Notes

Force and Pressure

Force and pressure are related but not the same
The effectiveness of the applied force is influenced by the area of contact

Pressure Definition

Pressure is defined as the force exerted perpendicularly on a unit area
Pressure formula: Pressure = Force / Area on which the force is applied

Pressure Properties

Pressure is directly proportional to the force
Pressure is inversely proportional to the area of contact
Greater the force, greater is the pressure
Greater the area of contact, lesser is the pressure
Lesser the area of contact, higher is the pressure

SI Unit of Pressure

SI unit of force: newton (N)
SI unit of area: m²
SI unit of pressure: N/m² or pascal (Pa)
1 N/m² = 1 Pa

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Description

This quiz explores the concept of pressure exerted by solids, explaining the difference between force and pressure through an example of two board pins with sharp and blunt tips.