SmarterEd

Aussie Maths & Science Teachers: Save your time with SmarterEd

HMS, BM EQ-Bank 49

Explain how TWO biomechanical principles can be applied to improve movement efficiency for a person using a prosthetic leg.  (4 marks)

Show Answers Only

Sample Answer

Center of gravity positioning:

  • Needs to be maintained over base of support
  • Reduces energy expenditure in maintaining balance
  • Allows for smoother progression of movement

Lever principles:

  • Prosthetic foot placement affects leverage
  • Efficient force transfer through prosthetic limb
  • Reduces energy needed for forward progression
Show Worked Solution

Sample Answer

Center of gravity positioning:

  • Needs to be maintained over base of support
  • Reduces energy expenditure in maintaining balance
  • Allows for smoother progression of movement

Lever principles:

  • Prosthetic foot placement affects leverage
  • Efficient force transfer through prosthetic limb
  • Reduces energy needed for forward progression

HMS, BM EQ-Bank 48 MC

Which adaptation would BEST improve movement efficiency for a person with limited lower limb mobility using a wheelchair?

  1. Increased arm length
  2. Higher seat position
  3. Forward tilted seat
  4. Lower center of gravity
Show Answers Only

\(D\)

Show Worked Solution

Consider Option D: Lower centre of gravity

  • Lower center of gravity improves stability and reduces energy needed for movement control

Other Options:

  • A: Not modifiable/not relevant to efficiency
  • B: Would decrease stability and efficiency
  • C: Would increase energy needs for stability

\(\Rightarrow D\)

HMS, BM EQ-Bank 47 MC

For a person using crutches, which biomechanical principle is MOST important for energy efficient movement?

  1. Angular momentum
  2. Base of support
  3. Projectile motion
  4. Fluid resistance
Show Answers Only

\(B\)

Show Worked Solution

Consider Option B: Base of support

  • A stable and appropriate base of support enables efficient force transfer and reduces energy expenditure

Other Options:

  • A: Not primary principle in crutch gait efficiency
  • C: No projectiles involved in crutch walking
  • D: Not relevant to crutch-assisted movement

\(\Rightarrow B\)

HMS, BM EQ-Bank 44

Describe TWO ways muscle pairs work together to produce safe movement.  (3 marks)

Show Answers Only

Sample Answer

  • Agonist/antagonist relationship controls movement speed
  • Co-contraction provides joint stability
  • Balanced strength prevents muscle imbalances
  • Coordinated action produces smooth movement
Show Worked Solution

Sample Answer

  • Agonist/antagonist relationship controls movement speed
  • Co-contraction provides joint stability
  • Balanced strength prevents muscle imbalances
  • Coordinated action produces smooth movement

HMS, BM EQ-Bank 43

Analyse how biomechanical principles influence the safe execution of a landing from a jump.  (4 marks)

Show Answers Only

Sample Answer

  • Force absorption through muscle eccentric contraction
  • Joint flexion increases time of force absorption
  • Wider base of support increases stability
  • Center of gravity lowering improves balance
  • Alignment of joints reduces injury risk
Show Worked Solution

Sample Answer

  • Force absorption through muscle eccentric contraction
  • Joint flexion increases time of force absorption
  • Wider base of support increases stability
  • Center of gravity lowering improves balance
  • Alignment of joints reduces injury risk

HMS, BM EQ-Bank 38 MC

During a squat, which biomechanical principle is MOST important for maintaining safety? 

  1. Fluid mechanics
  2. Base of support
  3. Projectile motion
  4. Angular momentum
Show Answers Only

\(B\)

Show Worked Solution

Consider Option B: Base of Support

  • A wider base of support in squat provides stability and reduces risk of injury

Other Options:

  • A: Not relevant to squatting stability
  • C: No projectile motion in squatting
  • D: While rotation may occur, not primary safety principle

\(\Rightarrow B\)