🔽 Pressure in Fluids
Master the fundamental concepts of pressure in fluid systems. This quiz covers the definition of pressure as force per unit area, calculations using real measurements, how pressure changes with depth, Pascal's law in connected systems, and the practical difference between gauge and absolute pressure. Ideal for Grade 8 physics learners. **What you'll learn:** - Define pressure and apply the formula $P = \frac{F}{A}$ - Calculate pressure from force and area measurements - Explain how pressure increases with depth in fluids - Apply Pascal's law to hydraulic and connected fluid systems - Distinguish between gauge and absolute pressure in real contexts
Questions in this quiz
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- Question 1
A force of 100 N is applied over an area of 5 m². What is the pressure exerted?
- Question 2
Pressure is a scalar quantity that has both magnitude and direction.
- Question 3
A student stands on a tiled floor wearing flat shoes. Her total mass is 60 kg and the contact area of both shoes is 0.03 m². What pressure does she exert on the floor? (Use m/s²)
- Question 4
At what depth in a lake does pressure increase most significantly?
- Question 5
A diver experiences greater pressure at a depth of 20 m than at a depth of 10 m because there is more water above pushing down.
- Question 6
A hydraulic lift uses Pascal's law to lift a car. If a 10 N force is applied to a small piston with an area of 0.1 m², and the large piston has an area of 1 m², what force is exerted on the large piston?
- Question 7
Which of the following best demonstrates Pascal's law in action?
- Question 8
Gauge pressure is the absolute pressure minus atmospheric pressure.
- Question 9
A tire gauge reads 32 psi (gauge pressure). If atmospheric pressure is 14.7 psi, what is the absolute pressure inside the tire?
- Question 10
Why does a narrow needle on a sewing machine exert high pressure when applying the same force as a hammer head?
- Question 11
Atmospheric pressure at sea level is approximately 101 325 Pa (or 1 atm).
- Question 12
In a U-tube manometer, if the fluid level on one side is higher than the other, what does this indicate?
- Question 13
A swimming pool is 2 m deep. What is the pressure at the bottom of the pool due to the water alone? (Use kg/m³ for water density and m/s²)
- Question 14
If you increase the contact area between a book and a table while keeping the force constant, the pressure exerted by the book on the table will decrease.
- Question 15
In a connected fluid system at equilibrium, which statement about pressure is true?
- Question 16
Why do underwater structures like submarine hulls need to be extremely strong and thick?