GCSE PE Examination Preparation

Introduction

• Importance of subscribing for updates
• Focus on lever systems in the examination

Lever Systems Components

• Fulcrum: Pivot point
• Resistance: Load
• Effort: Force applied
• Memorization Tip: FRE123
  • Fulcrum is central in a First class lever
  • Resistance is central in a Second class lever
  • Effort is central in a Third class lever

Drawing Lever Systems

• Use symbols to represent each component:
  • Arrow for Effort
  • Square for Resistance
  • Triangle for Fulcrum

First Class Lever System Examples

• Movement of the neck:
  • Fulcrum: Joint behind the jawbone
  • Effort: Neck muscles
  • Resistance: Weight of the head
• Tricep extension/Football throw:
  • Fulcrum: Elbow
  • Effort: Tricep
  • Resistance: Dumbbell/Football

Second Class Lever System Examples

• Ankle movements (e.g., calf raise):
  • Fulcrum: Ball of the foot
  • Effort: Gastrocnemius muscle
  • Resistance: Body weight
• Starting position in sprints/Running: Similar lever dynamics

Third Class Lever System Examples

• Bicep curl:
  • Fulcrum: Elbow joint
  • Effort: Bicep muscle
  • Resistance: Dumbbell

Mechanical Advantage and Disadvantage

• Second Class Lever System:
  • Has a mechanical advantage
  • Short resistance arm; long effort arm
  • Minimal input force required; great output force
  • Example: Easy calf raise
• Third Class Lever System:
  • Has a mechanical disadvantage
  • Short effort arm; long resistance arm
  • Greater input force required

Conclusion

• Encouragement for exams
• Open invitation for questions or concerns in comments
• Thanks and farewell