Question

When a body is immersed in a fluid either wholly or partially, it is lifted up by a force which is equal to the weight of the fluid displaced by the body is known as

• A. Pascal's law
• B. Euler's principle
• C. Reynold's law
• D. Archimede's principle

Hint:

Remember the key fluid principles:
- Archimedes' Principle: Deals with buoyancy. The upward force equals the weight of the displaced fluid.
- Pascal's Law: Deals with pressure transmission in a confined fluid.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
"Body immersed...lifted by force equal to weight of displaced fluid." Name the principle.

Step 2: Key Principle (Alternate):
Archimedes' principle: F_buoyant = ρ_fluid × g × V_displaced. Explains floating and submerged bodies.

Step 3: Detailed Explanation:
Pascal: pressure transmission in confined fluid. Euler: inviscid flow equations. Reynolds: laminar/turbulent transition. Archimedes is the correct buoyancy law.

Step 4: Final Answer:
Archimedes' principle.