Discribe an activity to prove the law of flotation with diagram
Answers
When any boat displaces a weight of water equal to its own weight, it floats. This is often called the "principle of flotation. A floating object displaces a weight of fluid equal to its own weight.
Flotation can be defined as the tendency of an object to rise up to the upper levels of the fluid or to stay on the surface of the fluid.
CONDITIONS FOR OBJECTS TO FLOAT :
1 - The average density of the object should be less than the density of the fluid in which the object has to float.
Example, a ship is very heavy but it floats because it is hollow inside it contains air, this causes its average density to be lower than that of water.
2 - The upthrust force of the fluid on the object must be equal total weight of the object.(law of floatation)
Example, a coin will sink to the bottom when placed on the surface of water, this is because the upthrust of water on coin is less than its weight
3 - The volume of object submerged must be large so as to displace large amount of fluid.
Archimedes discovered law of flotation. According to him, all the objects placed in a liquid experience an upward force which allows the body to float if it displaces water with the weight equal to the weight of the body. This upward force is known as buoyant force and the law is known as the law of buoyancy. Mainly, flotation depends upon the density.
Do you know What causes flotation ?
Things float when they are positively buoyant, or less dense than the fluid in which they are sitting. This does not mean that an object has to be lighter than the fluid, as in the case of a boat; objects just need to have a greater ratio of empty space to mass than the fluid.