Fluid Mechanics
Physics ⇒ Mechanics
Fluid Mechanics starts at 8 and continues till grade 12.
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See sample questions for grade 8
A block of wood floats on water but sinks in oil. Is the density of oil greater or less than that of water?
A container is filled with water to a height of 0.5 m. If the density of water is 1000 kg/m³ and g = 10 m/s², what is the pressure at the bottom of the container?
A cube of side 0.1 m is completely submerged in water. If the density of water is 1000 kg/m³ and g = 10 m/s², what is the buoyant force on the cube?
A sealed syringe filled with water is pressed at one end. The pressure is felt at the other end. This demonstrates which law?
A stone weighs 10 N in air and 7 N when fully immersed in water. What is the buoyant force acting on the stone?
A submarine is at a depth where the water pressure is 2 × 105 Pa. If the area of the hatch is 0.5 m², what is the force on the hatch?
Describe what happens to the buoyant force on an object as it is lowered deeper into a fluid.
Explain why a steel ship floats on water even though steel is denser than water.
Explain why air pressure decreases as altitude increases.
Explain why atmospheric pressure does not crush our bodies.
If a liquid has a high viscosity, will it flow quickly or slowly?
If the area of a surface is 2 m² and the force applied is 100 N, what is the pressure exerted on the surface?
If the mass of 2 liters of oil is 1.6 kg, what is the density of the oil in kg/m³?
State Archimedes' Principle.
State Bernoulli's Principle.
What is the SI unit of pressure?
Which law states that the pressure applied to an enclosed fluid is transmitted undiminished to every part of the fluid?
Which principle explains why a ship floats on water?
A metal sphere weighs 50 N in air and 30 N when fully submerged in a liquid. What is the density of the liquid if the volume of the sphere is 0.002 m³? (Take g = 10 m/s²)
A tank contains two immiscible liquids, oil (density = 800 kg/m³) floating on water (density = 1000 kg/m³). If the oil layer is 0.3 m thick and the water layer is 0.7 m thick, calculate the total pressure at the bottom of the tank. (Take g = 10 m/s²)
