Biomechanics (definitions)

Question 1

Momentum

Answer 1

a measure of the amount of motion possessed by a moving body (p=mv)

Question 2

Moment of inertia

Answer 2

refers to the resistance of a rotating object to change its state of motion.

Question 3

Angular momentum

Answer 3

the quantity of angular motion possessed by a rotating body.

angular velocity * moment of inertia

Question 4

Levers

Answer 4

fulcrum/axis: point around which the lever rotates

effort/force arm: the distance between the fulcrum and the point at which the force is applied.

resistance arm: the distance between the fulcrum and the centre of the resistance.

Question 5

Fluid flow

Answer 5

the natural science of fluids (liquids or gases) in motion.

Question 6

Laminar flow

Answer 6

a type of fluid flow in which fluid moves smoothly in individual layers or streams.

Question 7

Turbulent flow

Answer 7

flow in which the velocity at any point varies erratically.

Question 8

Pressure drag (form drag)

Answer 8

resistance created by pressure differential between front and back of an object moving through a fluid.

Question 9

Surface drag

Answer 9

friction produced between fluid and surface of a moving object.

Question 10

Wave drag

Answer 10

resistance formed by the creation of waves at the point where air and water interact.