Drag and Lift

Drag in a fluid is primarily caused by the viscous forces acting on the surface of an object moving through the fluid.

The temperature of the fluid does not directly affect the drag force on an object.

Drag force is proportional to the square of the velocity of the object in a fluid.

Lift in a fluid is primarily caused by the pressure difference between the upper and lower surfaces of an object moving through the fluid.

The shape of the object does not directly affect the lift force on an object in a fluid.

Lift force is proportional to the angle of attack of the object in a fluid.

Stall is the term used to describe the point at which the lift force on an object becomes zero.

All of the options are examples of devices that generate lift in a fluid.

Drag is the term used to describe the force that opposes the motion of an object through a fluid.

All of the options are examples of devices that generate drag in a fluid.

Drag force is proportional to the density of the fluid.

Honey is an example of a fluid that has a high density.

Drag force is proportional to the surface roughness of an object.

A golf ball is an example of an object with a rough surface.

Laminar flow is the term used to describe the phenomenon where a fluid flows smoothly over a surface.