List of top Physics Questions on Fluid Mechanics asked in JEE Main

Given below are two statements :
Statement-I: When a capillary tube is dipped into a liquid, the liquid neither rises nor falls in the capillary. The contact angle may be 0°.
Statement-II: The contact angle between a solid and a liquid is a property of the material of the solid and liquid as well : In the light of above statement.
Choose the correct answer from the options given below.

Given below are two statements:
Statement I: When the speed of liquid is zero everywhere, the pressure difference at any two points depends on the equation \[P_1 - P_2 = \rho g (h_2 - h_1).\]
Statement II: In the ventury tube shown, \[2gh = v_1^2 - v_2^2.\]

In the light of the above statements, choose the most appropriate answer from the options given below.

A plane is in level flight at constant speed and each of its two wings has an area of 40 m² . If the speed of the air is 180 km/h over the lower wing surface and 252 km/h over the upper wing surface, the mass of the plane is ________kg. (Take air density to be 1 kg m^–3 and g = 10 ms^–2

In a test experiment on a model aeroplane in wind tunnel, the flow speeds on the upper and lower surfaces of the wings are 70 ms^–1 and 65 ms^–1 respectively. If the wing area is 2 m2 the lift of the wing is _______ N.
(Given density of air = 1.2 kg m^-3)

The correct expression for Bernoulli's theorem is (the symbols have their usual meaning)