Question

What do you mean by upthrust in fluid

Answer 1

Upthrust is defined as the upward force on the object provided by theliquid because the object has "displaced" some of the fluid. ... When a body is wholly or partially immersed in a liquid there is an upthrust which is equal to the weight of liquiddisplaced.

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Answer 2

Upthrust :- the upward force that a Liquid or Gas exerts on a body floating in it.