1. PE - Biomechanics

2. Do now.... Think about your biomechanical principle from last lesson?.. What was it? Create a quick brainstorm bout your ideas ( be prepared to share with the class)

3. Success Criteria How do we know what we have learnt? Identify a 1 st class, 2 nd class and 3 rd class leaver, and apply to sporting examples. Describe how forces affect objects ( accelerate, decelerate, change shape, and direction)

4. Cause a body to accelerate Sporting example: Sailing boat. The force that causes the boat to acceleration is the wind. Forces Can -

5. Cause a body to decelerate Sporting example: Sailing boat. The force that causes the boat to deceleration is the wind.

6. Forces Can - Cause a body to change direction Sporting example: Tennis The force that causes the Ball to change direction is the racquet impact.

7. Forces Can - Cause a body to change shape Sporting example: Golf The force that causes the ball to change shape is the impact from the club head. Ball shape is compressed by the force of the club head on impact

8. Centre of Mass An imaginary point which is movable and is where the mass of an object is concentrated. Centre Of Mass

9. Centre Of Mass As the mass of the arms move up so will the centre of mass

10. Centre Of Mass Base of Support Stability Stability is dependant on the Centre of Mass being directly above the Base of Support

11. Centre of Mass Remember Centre Of Mass doesn’t always need to be inside the body

12. LEVERS - First Class Lever E.g Head on Vertebrae Fulcrum in Middle Resistance Fulcrum Effort

13. First class lever examples.

14. Second Class Lever E.g Rising on to toes / calf raise Resistance in the Middle Resistance Fulcrum Effort

16. Third Class Lever E.g Bicep Curl Effort in the Middle Most frequently occurring lever in the body Resistance Fulcrum Effort

18. Your turn. Use the worksheet to now apply what you have learnt about levers.