What Is Biomechanics in IB SEHS?
Biomechanics in SEHS is the study of human movement through mechanical principles. It examines how forces interact with the body to influence performance, posture, and injury.
Get a detailed breakdown with RevisionDojo’s SEHS Topic 4 Notes.
1. Understanding Force and Motion
- Force is a vector quantity—meaning it has both magnitude and direction.
- Contact forces include friction and tension; non-contact forces include gravity.
- These forces initiate or change motion in the body.
Learn how forces act in motion with RevisionDojo’s Biomechanics Practice Tools.
2. Centre of Mass and Stability
The centre of mass (COM) is the average point of mass distribution in the body.
- A wider base of support = more stability.
- A lower COM = more balance.
- When the line of gravity falls outside the base, instability increases.
Test your understanding using RevisionDojo's Topic 4.3 Injury Question Bank.
3. Levers in Human Movement
Levers in the body are formed by bones (bars), joints (fulcrums), and muscles (effort).
