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Q: When a body is completely or partially immersed in a fluid, this body experiences a force equal to the weight of the displaced fluid, this principle is known as
  • A. Pascal law
  • B. Archimedes principle
  • C. Stocks law
  • D. Newton law of motion
Correct Answer: Option B - When an object is immersed in a liquid, a vertical force acts upwards on the object, which is called buoyancy force. Its value is equal to the weight of the fluid displaced by the body or object. The value of buoyancy force does not depend on the depth of fluid. It is directly proportional to the density of the fluid and the volume of fluid displaced by the object.
B. When an object is immersed in a liquid, a vertical force acts upwards on the object, which is called buoyancy force. Its value is equal to the weight of the fluid displaced by the body or object. The value of buoyancy force does not depend on the depth of fluid. It is directly proportional to the density of the fluid and the volume of fluid displaced by the object.

Explanations:

When an object is immersed in a liquid, a vertical force acts upwards on the object, which is called buoyancy force. Its value is equal to the weight of the fluid displaced by the body or object. The value of buoyancy force does not depend on the depth of fluid. It is directly proportional to the density of the fluid and the volume of fluid displaced by the object.