Questions and Answers
What is the reason why the sharp pin pierces the board, but the flat pin does not?
The area of contact between the tip of the pin and the board is smaller in the sharp pin.
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 _______________.
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Match the following quantities with their SI units:
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What happens to the pressure when the area of contact increases?
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1 N/m² is equal to 1 Pa.
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Why is the effectiveness of the applied force different in the cases of the sharp and flat pins?
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Pressure is defined as the force exerted _______________ on a unit area.
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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.
