test: technology

Question 1

what are the three biomechanics?

Answer 1

limb kinematics

force plates

wind tunnels

Question 2

what is limb kinematics?

Answer 2

the study of movement in relation to time and space.

it records an athlete performing a sporting action and allows measurements of displacement, velocity and acceleration to be analysed.

Question 3

how does limb kinematics work?

Answer 3

computer software linked to multiple cameras

converts motion shown by reflective markers placed on the bodies joints

Question 4

advantages of limb kinematics

Answer 4

• results are immediate, objective and highly accurate which allows the coach to adjust technique
• can focus on a specific joint

Question 5

disadvantages of limb kinematics

Answer 5

• accuracy depends of correct placement of markers
• equipment is expensive

Question 6

what do force plates measure?

Answer 6

ground reaction forces

• data from an athlete balancing, running and jumping on a force plate can be used to assess the size and direction of forces

Question 7

what is a force plate?

Answer 7

a rectangular metal plate with built in force transducers usually sunk into the ground to become part of the floor

Question 8

advantages of force plates

Answer 8

• gives immediate, accurate and reliable results to analyse performance and health

Question 9

disadvantages of force plates

Answer 9

• expensive equipment
• can cause performers to adapt the way they run or jump, limiting its potential use

Question 10

how do wind tunnels work?

Answer 10

objects can be placed inside a wind tunnel

to measure the forces produced by air against its surface

dye or smoke is injected into the tunnel to observe air flow

Question 11

why are wind tunnels used?

Answer 11

aims to improve air flow around an object

streamlining its path through the oncoming air and increasing lift or decreasing drag

Question 12

advantages of wind tunnels

Answer 12

• allows for tight control of environmental variables
• gives them the ability to control cross winds or measure air resistance

Question 13

disadvantages of wind tunnels

Answer 13

• expensive equipment