Test: Floatation - SSC CGL MCQ

Floatation, refers to the property of an object to stay on the surface or in the upper layers of a liquid. This characteristic is dependent on factors like the density of the object and the liquid it's placed in. When an object is less dense than the liquid it's in, it will float, demonstrating this principle of floatation.

Floatation is differentiated from sinking in the given description by the fact that floatation involves an object remaining on the surface or in the upper layers of a liquid, while sinking entails the object descending to the lower levels of the fluid. This distinction is crucial in understanding the behavior of objects in liquids based on their densities.

Whether an object floats or sinks in a liquid is determined by the relative densities of the object and the liquid. If the object is less dense than the liquid, it will float; if it's more dense, it will sink. This principle is fundamental in understanding buoyancy and the behavior of objects in different fluids.

An object floats in a liquid according to the principle of floatation because it displaces an amount of liquid equal to its own weight. This means that the buoyant force acting on the object is equal to the weight of the liquid displaced. This principle, as articulated by Archimedes, helps us understand why objects like a leaf can float on water despite their density.

Floatation, neutral equilibrium signifies that an object with a density equal to that of the liquid will float fully submerged. This state occurs when the weight of the object is precisely balanced by the weight of the liquid it displaces. Achieving neutral equilibrium is crucial for understanding the behavior of objects in fluids.

The alignment of the center of gravity of an object and the center of gravity of the displaced liquid vertically is essential for maintaining stability and preventing the object from tipping over. This alignment helps ensure that the object remains in a balanced position while floating, enhancing its stability in the liquid.

For an object to float in a fluid, it must meet the condition where the object's average density is less than the fluid's average density. This is a fundamental principle in fluid dynamics known as buoyancy. When the object is less dense than the fluid it's placed in, it experiences an upward force called buoyant force or upthrust, which opposes the object's weight, allowing it to float. This concept is crucial in understanding why certain objects float while others sink in fluids.

The submerged volume of an object is crucial in its ability to float as it needs to displace a significant amount of fluid. When an object is placed in a fluid, it displaces an amount of fluid equal to its own volume. For the object to float, the volume of fluid displaced must be sufficient to create an upthrust force greater than the object's weight. This principle is key in understanding the conditions required for an object to float in a fluid.

In order for an object to float, the upthrust exerted by the liquid must exceed the object's total weight. This difference in forces creates a net upward force, allowing the object to remain buoyant and float on the surface of the fluid. Understanding this relationship between upthrust and weight is essential in comprehending the physics of floating objects and buoyancy.

The buoyant force is the force that makes submerged objects feel lighter and increases with the volume of the submerged body and the fluid's density. This force is responsible for objects floating in fluids like water or air. It acts opposite to the force of gravity, helping objects to float or rise in a fluid.

When an object's real weight and upthrust are equal, it means that the floating body displaces its own weight in the fluid. This equilibrium state allows the object to remain afloat, as the upthrust force is equal to the weight of the object, preventing it from sinking or accelerating further downwards.

Ships manage to float despite being made of dense materials like iron by displacing an amount of water equal to their weight. By being designed to be hollow and increasing their volume, ships can displace a large amount of water, which creates the necessary upthrust to keep them afloat.

Density plays a crucial role in determining whether an object will float or sink in a liquid. The density of an object compared to the density of the liquid it's placed in determines its buoyancy. If the object is less dense than the liquid, it will float; if it's more dense, it will sink. Understanding this relationship is key to explaining the behavior of objects in fluids.

The density of an object plays a crucial role in determining whether it will float in a liquid. An object will float if its density is lower than the density of the liquid it is placed in. This relationship between densities helps explain why objects like wood or plastic, with lower densities compared to water, can float on the water's surface.

Among the conditions listed, the object's weight being greater than the upthrust exerted by the fluid is not necessary for the object to float. In fact, for an object to float, the upthrust should exceed the object's total weight, creating a buoyant force that keeps the object afloat. This distinction is essential in understanding the dynamics of floating objects and the principles of buoyancy.