Chap 06 - Fluid Dynamics

The net force on a body falling with a terminal velocity through a viscous liquid will be

• 0 N.

• 1 N.

• 2 N.

• 4 N.

Tags

NGSS.HS-PS2-1

A spherical body of mass m and radius r, falls down through air of viscosity v as shown in figure.

Which of the following graphs shows the best variation of velocity of the body against time.

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

If a cricket ball is rotating on its axis as shown in the figure below, what is the direction of its movement?

• Downward

• Rightward

• Leftward

• Upward

The equation  $A_1v_1=A_2v_2$ is called

• Equation of continuity.

• Bernoulli's equation

• Venturi relation.

• Stoke's law.

In fluid dynamics, which of the following fundamental expressions links pressure to the fluid's speed and height?

• Pascal's law.

• Stokes' law.

• Archimedes' principle.

• Bernoulli's equation

The terminal velocity of a free falling water droplet in air is attained when

• drag force = - weight of droplet

• drag force = weight of droplet

• drag force < weight of droplet

• drag force > weight of droplet

What will be the velocity of water falling from a greater height as it reaches the ground?

• increasing.

• decreasing.

• become zero.

• remain constant.

Tags

NGSS.HS-PS2-4

The equation is valid for a fluid having

• compressibility and steady flow.

• incompressibility and steady flow.

• compressibility and unsteady flow.

• incompressibility and unsteady flow.

The given diagrams show the same scale vertical sections of a set of circular vessels, each containing the same depth of water. Which of the following statement is correct?

• Water exerts the greatest pressure on the base of vessel P.

• Water exerts the greatest pressure on the base of vessel S.

• Water exerts the same pressure on the base of each vessel.

• Water exerts different pressure on the base of

All of the following are applications of Bernoulli's effect EXCEPT

• atomizer.

• filter pump.

• Venturi meter.

• vacuum cleaner.