7.4. Basic Concepts of Fluid at Rest

Try these first

1. 1.

   What is hydrostatics?

   Hint

   Think about fluids that are not in motion.

2. 2.

   Describe Pascal's Law in simple terms.

   Hint

   Consider how force is transmitted in a hydraulic system.

3. 3.

   What happens to the pressure in a fluid at rest as you go deeper?

   • It decreases
   • It remains the same
   • It increases

   Hint

   Think about the weight of water above you in a swimming pool.

4. 4.

   True or False: Pascal’s Law states that pressure changes in a confined fluid are transmitted equally in all directions.

   • True
   • False

   Hint

   Recall the principle of how hydraulic brakes work.

5. 5.

   A water reservoir has a pressure of 200 kPa at the bottom due to the height of water. Calculate the height of the water column. (Use ρ = 1000 kg/m³ and g = 9.81 m/s²)

   Hint

   Start by rearranging the hydrostatic pressure equation.

6. 6.

   In a hydraulic press, if a small piston diameter is 10 cm and a larger piston diameter is 40 cm. If a force of 50 N is applied on the small piston, what is the force exerted on the larger piston?

   Hint

   Remember the area ratio function of Pascal’s law.