Physics
What do you understand by the term upthrust of a fluid? Describe an experiment to show it's existence.
Fluids Upthrust
156 Likes
Answer
The upward force exerted on a body by the fluid in which it is submerged is called upthrust or buoyant force.
Experiment —
If a piece of cork is placed on a surface of water in a tub, it floats with nearly of it's volume inside the water. If the cork is pushed into the water and then released, it again comes to the surface of water and floats.
If the cork is kept immersed, our fingers experience some upward force. This upward force is the buoyant force.
Answered By
87 Likes
Related Questions
A body held completely immersed inside a liquid experiences two forces (i) F1, the force due to gravity and (ii) F2, the buoyant force. Draw a diagram showing the direction of these forces acting on the body and state the conditions when the body will float or sink.
Prove that the loss in weight of a body when immersed wholly or partially in a liquid is equal to the buoyant force (or upthrust) and this loss is because of the difference in pressure exerted by liquid on the upper and lower surfaces of the submerged part of the body.
Describe an experiment to verify Archimedes' principle.
Describe an experiment to show that a body immersed in a liquid appears lighter than it really is.