Fluid Dynamics

The study of properties of fluids in motion is called

• Fluids Study

• Fluids statics

• Fluids dynamics

• None

The dimensions of coefficient of viscosity is:

• ML¹T^-2

• M²L¹T¹

• ML^-1T^-1

• ML^-1T^-2

The equation 𝐹 = 6𝜋𝜂𝑟𝑣 is called:

• Newton’s law

• Stoke’s law

• Ohm’s law

• Lenz’s law

An object moving through a fluid experience a retarding force called:

• Drag force

• Gravitational force

• Terminating force

• Frictional force

When weight of an object falling freely becomes equal to the drag force, then the body will move with:

• Increasing speed

• Decreasing speed

• Constant speed

• Constant acceleration

Tags

NGSS.HS-PS2-1

The maximum constant velocity of an object falling vertically downward is called:

• Final velocity

• Terminal velocity

• Instantaneous velocity

• Average velocity

When the body reaches its terminal velocity, the acceleration of the body becomes

• Zero

• Minimum

• Maximum

• Half of the initial

Tags

NGSS.HS-PS2-1

As the water falls from tap, its speed increases and cross sectional area:

• Decreases

• Increases

• become zero

• becomes Constant

If radius of droplet becomes half then its terminal velocity will be:

• Half

• Double

• One forth

• Four times

Turbulent flow is

• Unsteady and regular

• Steady and regular

• Unsteady and irregular

• Steady and regular