AS Physical Education 2015/16 Introduction lesson and summer starter.

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The study of forces and their effects on the human body

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Presentation transcript:

AS Physical Education 2015/16 Introduction lesson and summer starter.

Who is fitter?

A: They are both fit, they are fit for purpose. Different types of fitness.  Body composition  Flexibility  Muscular strength  Muscular Endurance  Cardiovascular

 How is he able to do that?  Sir Isaac Newton knows.

 Sir Isaac Newton  Laws of Motion : Biomechanics

MOTION

Motion 1.Linear motion – straight or curved line. Motion along a line. All parts same speed / direction. 2. Angular motion – circle or part of a circle. Movement around a fixed point or axis. 3. General motion – combination of linear and angular motion

Sheet task

With a partner identify which motions are linear, angular, general. 1.Pure linear motion 2.Pure angular motion 3.General motion You need to be able to explain why they are each type of motion

 So how do we create linear or angular?  Or in other words, how do we bend it like Beckham?

 Force applied through the centre of mass is known as = Direct Force which gives us linear motion.  Force applied outside of the centre of mass is known as: = Eccentric which gives us = angular motion.

Centre of Mass and Application of Force  Linear motion – force passes through the centre of mass DIRECT FORCE  Angular motion – force passes outside the centre of mass ECCENTRIC FORCE

Application of Force & Centre of Mass Application of F Type of FType of MEgs of this Force passes through the Centre of Mass DIRECTLINEAR Tennis drive Vertical jump Shot put Force passes outside the Centre of Mass Movement in circle (part) around axis of rotation ECCENTRICANGULAR Tennis topspin or slice Curve ball / spin Beckham free kick Golf wedge shot

Free kick  The centre of mass is in the middle as all sides are balanced. When I applied an eccentric force which is outside of the centre of mass I created angular motion. This causes the ball to spin around an axis or central point.  However, there was also some direct force applied through the centre of mass which causes linear motion. So the combination of both of these gives use general motion. The ball moves forwards along a line but there is also rotation around an axis. The application of both of these forces will cause the ball to move in the air and swerve.