ATC Aquatic Kinesiology & Biomechanics

Question 1

According to Archimedes' principle, the buoyant force acting on an immersed object is equal to:

Accepted Answer

The weight of the water displaced by the object

Answer

The weight of the object

Answer

The volume of water surrounding the object

Answer

The density of the water multiplied by gravity

Question 2

Which characteristic of water creates resistance to movement that increases with the square of the patient's velocity?

Accepted Answer

Drag force

Answer

Buoyancy

Answer

Hydrostatic pressure

Answer

Surface tension

Question 3

In the human body, the center of buoyancy is typically located in which region?

Accepted Answer

Upper chest and thorax

Answer

Pelvis

Answer

Lower lumbar spine

Answer

Umbilical region

Question 4

The average specific gravity of the human body is approximately 0.97. What is the primary clinical implication of this value?

Accepted Answer

Most patients can float because their density is slightly less than water

Answer

Most patients will sink unless supported by equipment

Answer

Patients require weights to remain submerged for deep-water exercise

Answer

Buoyancy forces will compress rather than unload joints

Question 5

According to Pascal's law, hydrostatic pressure in aquatic therapy increases proportionally with:

Accepted Answer

Depth of immersion

Answer

Water temperature

Answer

Patient body surface area

Answer

Water salinity alone

Question 6

An object will float in water when its specific gravity is:

Accepted Answer

Less than 1.0

Answer

Equal to 1.0

Answer

Greater than 1.0

Answer

Greater than 1.5

Question 7

The viscosity of water provides therapeutic benefit in aquatic resistance exercise primarily by:

Accepted Answer

Creating consistent resistance throughout the full range of motion in all directions

Answer

Reducing joint compression forces

Answer

Increasing buoyancy forces on the limb

Answer

Lowering water temperature during exercise