Pressure Puzzles
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1. Define pressure.
Hint: It involves force and area.
Answer: Pressure is the force exerted per unit area.
2. What is the SI unit of pressure?
Hint: It is named after a scientist.
Answer: The SI unit of pressure is pascal (Pa).
3. State the formula for pressure.
Hint: It is a ratio of two quantities.
Answer: Pressure = Force / Area.
4. Calculate the pressure exerted by a 50 N force on an area of 5 m².
Hint: Use the formula: Pressure = Force / Area.
Answer: Pressure = 50 / 5 = 10 Pa.
5. What happens to pressure if the area is halved while the force remains the same?
Hint: Think about the inverse relationship.
Answer: The pressure doubles.
6. Why do sharp knives exert more pressure than blunt knives?
Hint: Focus on the area of contact.
Answer: Sharp knives have a smaller area, which increases the pressure for the same force.
7. Calculate the force if a pressure of 200 Pa is exerted over an area of 2 m².
Hint: Rearrange the formula: Force = Pressure × Area.
Answer: Force = 200 × 2 = 400 N.
8. What is the effect of depth on liquid pressure?
Hint: It increases with depth.
Answer: Liquid pressure increases with depth.
9. A 600 N force is applied over an area of 3 m². Calculate the pressure.
Hint: Use the formula: Pressure = Force / Area.
Answer: Pressure = 600 / 3 = 200 Pa.
10. Why do camels have broad feet?
Hint: It reduces pressure.
Answer: Broad feet reduce pressure by increasing the area of contact with the ground.