Question

Law of floatation states
A. Weight of a flotation body is equal to the weight of the liquid displaced
B. The center of gravity of a floating body and the center of buoyancy are in different lines
C. Both
D. None

Answer 1

Hint: Law of floatation is commonly known as the Archimedes principle. The Archimedes principle is the basic law of the branch of physics fluid dynamics. This principal gives the explanation for buoyancy.

Complete step-by-step answer:
The Archimedes principle is also known as the law of floatation. When the object is placed in any fluid such that the object is submerged in the fluid. The fluid gets displaced due to the weight of the object. Thus, the weight of the object is equal to the amount of the fluid displaced. The force experienced by the fluid is known as the buoyant force or buoyancy of the object.

Consider the object is placed in the fluid with some part of the object submerged in the fluid. The object exerts the force on the fluid. This force is the weight of the object. The liquid exerts the force on the object. This force is known as the buoyant force. The direction of the buoyant force is vertically upwards. The direction of the weight is vertically downwards.
Both forces act in opposite directions. So, the resultant force acting on the object is the difference between the buoyant force and the weight of the object.

So, the correct answer is “Option C”.

Note: When the body is submerged in the fluid and the buoyancy is very small as compared to the weight of the body. The body sinks in the fluid.
When the body is submerged in the fluid and the buoyancy is very large as compared to the weight of the body. The body floats in the fluid.