Year 11 biomechanics with levers, force summation

Biomechanics The study of forces and their effects on the human body Year 11 Achievement Standard 1.2

Characteristics of motion ,[object Object],[object Object],Line out jumper in Rugby Union Drag Racing

Characteristics of motion ,[object Object],[object Object],Spinning a ball on your finger Spinning figure skater

Characteristics of motion ,[object Object],[object Object]

Characteristics of motion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Centre of gravity ,[object Object],[object Object],[object Object],[object Object]

Centre of gravity = Centre of gravity Centre of gravity for a “normal person”

Centre of gravity ,[object Object],= Centre of gravity

Line of gravity - The line of gravity is important when determining the stability of an object. ,[object Object],[object Object],[object Object]

Line of gravity Centre of gravity STABLE Centre of gravity UNSTABLE Line of gravity Line of gravity

Base of support – The object on the left is more stable because of its relatively larger BOS ,[object Object],Wide BOS Narrow BOS BOS BOS

Line of gravity, BOS in relation to movement ,[object Object],[object Object],[object Object],Line of gravity Leg pushes against the ground Top of body moves towards LOG Direction of movement Base of support

Centre of gravity, Line of gravity, Base of support and Physical activity ,[object Object],[object Object],[object Object]

5 Quick Questions ,[object Object],[object Object],[object Object],[object Object],[object Object]

Force ,[object Object],[object Object],[object Object],[object Object]

Levers – are used to apply force ,[object Object],Lever arm Resistance Fulcrum (pivot point) Downward Pressure

Levers ,[object Object],[object Object],[object Object],[object Object]

Using Levers in Sport ,[object Object],[object Object],[object Object]

Newton’s Laws ,[object Object],[object Object]

Newton’s 1 st Law – The law of inertia. ,[object Object],[object Object]

Newton’s 1 st Law – The law of inertia ,[object Object]

Newton’s 2 nd Law – Mass, force & acceleration ,[object Object],[object Object],[object Object],[object Object]

Newton’s 2 nd Law – mass, force & acceleration ,[object Object],[object Object]

Newton’s 3 rd Law – action & reaction ,[object Object],[object Object],[object Object]

Newton’s 3 rd Law – action & reaction

Force summation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Application of force summation – free-throw shot technique ,[object Object],[object Object],[object Object],[object Object]

Application of force summation – free-throw shot technique

Projectile motion ,[object Object],[object Object]

Speed, height & angle of release ,[object Object],[object Object],[object Object],90 degrees 0 degrees 45 degrees Angle of release

Height of release ,[object Object],[object Object]

Year 11 biomechanics with levers, force summation

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Year 11 biomechanics with levers, force summation

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