Biomechanics - Analysis of Physical Skills

Question 1

Force-motion

Answer 1

• Unbalanced forces are acting on our bodies or objects when we create or modify movement.

Question 2

Force-time

Answer 2

• The greater time over which force is applied, the greater the resulting motion.
• AKA Impulse

Question 3

Inertia

Answer 3

• The heavier an object, the more effort it takes to move.

- Objects resist change from their current state, inertia is a measure of this resistance.

Question 4

Range of Motion

Answer 4

• Relates to the type of motion, angular or linear, of body segments used to execute a movement.
• Reduced range of motion is best for low force, speed and high accuracy.

Question 5

Centre of Gravity

Answer 5

• Centre of mass

- The point in which the weight of the body is evenly distributed around.

Question 6

Stability

Answer 6

• Refers to the position of line of gravity is in relation to the base of support.
• The larger the base of support, the more stable the body.
• If the line of gravity is within the base of support, the body is balanced.
• Can improve stability by:
  
  • Increasing base of support
  • Lowering the centre of mass
  • Increasing the mass of the body

Question 7

Coordination Continuum

Answer 7

• Sequential movement = low force/high speed

- Simultaneous movement = high force

Question 8

Segmental Interaction

Answer 8

• Projectile gets released at greatest possible velocity
• Limbs fire so that the greatest velocity can be achieved
• Big to small

Question 9

Factors Affecting the distance of a projectile

Answer 9

• Velocity
• Angle of release
• Height of release