Question

If an ideal fluid element moves from a region of lower pressure to a region of higher pressure, is the work done on it by the pressure force positive, negative, or zero?

Answer 1

Answer:

Positive

Explanation:

An ideal fluid is on which is incompressible and non-viscous.

In an ideal fluid element when a fluid element moves from a region of high pressure to region of low pressure then the work done on the fluid element is positive because the force acts in the direction from high pressure towards low pressure and displaces the fluid element, so the work-done is positive.