Third-class levers, balance, summation of forces and optimal projection

What this note covers

1. Third-class levers dominate movement at the body's joints
2. Worked example: comparing lever arm lengths without a calculator
3. Balance depends on base of support, centre of gravity and mass
4. Applying balance principles to a sporting stance
5. Summation of forces: adding contributions from body segments
6. Worked example: sequential summation in a throw
7. Optimal projection balances angle, speed and height
8. How principles of movement are examined

8 sections · 10 key terms & formulas · 6 common mistakes