Key term
WJEC A-Level Physical Education 601-8485-1
Performance Analysis and Fitness Testing
Levers and Movement Analysis
Joints and the Musculo-Skeletal System
Components of Fitness and Methods of Training
Energy Systems and Principles of Training
Fatigue, Recovery and Rehabilitation
Diet, Nutrition and Hydration
Personality
Stress, Arousal and Anxiety
Motivation and Self-Efficacy
Skill, Ability and Skill Classification
Learning Curves, Theories and Stages
Transfer, Practice, Guidance and Feedback
Sport, Culture and Society
The Emergence of Modern Sport
Social Differentiation in Sport
Short-Term Responses to Exercise
Long-Term Adaptations to Exercise
Carbohydrate Loading and Supplements
Biomechanical Principles
Linear and Angular Motion
Projectile Motion and Fluid Mechanics
Attitudes
Aggression
Social Facilitation
Group Dynamics and Leadership
Attribution Theory
Information Processing and Memory
Ethics, Deviance and Doping
Sport and the Mass Media
Commercialisation and Globalisation
Projectile Motion and Fluid Mechanics
Spin and the Magnus effect
- 3 things to know
- A2 Unit 3
Overview
The Magnus force, how spin is created, the flight and bounce of topspin, backspin and sidespin, sidespin in football, tennis topspin and golf backspin, and reading spin to receive a ball.
What you need to know
Answer each one before you reveal it.
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Key term
What is the Magnus force, and how is spin put on a ball?
Key term
What is the Magnus force?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is the Magnus force?
Model answer
The Magnus force is the force created by a pressure difference around a spinning ball. The force makes the ball deviate from its expected path.
- 2
How is spin created?
Model answer
Spin is created by applying an eccentric force to a ball, off its centre of mass. The ball then rotates as it travels.
- 3
How does topspin affect a ball's flight?
Model answer
Topspin creates a downward Magnus force. The ball dips quickly in flight.
- 4
How does topspin affect a ball's bounce?
Model answer
A ball with topspin gains speed as it grips the surface. The ball kicks on quickly off the bounce.
- 5
How does backspin affect a ball's flight?
Model answer
Backspin creates an upward Magnus force. The ball stays in the air longer and floats.
- 6
How does backspin affect a ball's bounce?
Model answer
A ball with backspin loses speed as it grips the surface. The ball sits up at a steeper angle and may even check back.
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