Draw a FBD showing the 2 vertical forces in a sporting action of your choice 2 Describe Newtons 3 Laws of motion 3 Biomechanics Biomechanical Principles Centre of Mass and Stability ID: 935618
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Slide1
Quick Questions
Draw a FBD showing the 2 horizontal forces in a sporting action of your choice (2)
Draw a FBD showing the 2 vertical forces in a sporting action of
your choice
(2)
Describe Newton’s 3 Laws of motion (3)
Slide2Biomechanics
Biomechanical Principles – Centre of Mass
and Stability
Slide3Learning Objectives
Learning Objective:
Understand how centre of mass can affect stability.
Learning
Outcomes:
All:
Describe
the relationship between Centre of Mass and stability
Most:
Apply
your knowledge of centre of mass an stability to a variety of
sporting examples
Some
:
Explain
how athletes can use their knowledge to maximise performance
Slide4Key Terms
stability
= the ability of a body to return to equilibrium after being displaced.
centre of mass
= the point at which the body is balanced in all directions.
equilibrium
= a body is in equilibrium when the net force is
0 - all
forces are equally
balanced
Slide5Balance and Stability – how does it affect performance
https
://
www.youtube.com/watch?v=9R74-g1I4UM
(5min video)
Slide6factors affecting
stability
low
centre of mass
the
lower the centre of mass, the higher the
stability
increase size of base of support
the
larger the base of support, the higher the
stability
line of gravity is central to base of
support
if
the line of gravity is central to the base of support, stability is
increased
increased body mass or inertia
a
performer with a larger inertia/mass will have a greater
stability
Slide7Lets have a go
Take part in the following activities to see who can increase their balance and stability
1 v 1 – who can push the other across from room
Headstand / handstand
Stork stand / dancers pose
Slide8Would these athletes want to increase or decrease their stability?
Why?
Rugby player in a scrum
Diver
Sumo wrestler
Sprinter out of the blocks
High jumper
Gymnast
Slide9Exam Questions
June 2014 -
4b) Using examples, from sport, explain how performers maximise their stability. Using examples from sport, describe why a performer might want to minimise stability in sport. (5
)
June 2011
- 4a) What is meant by the terms ‘line of gravity’ and ‘base of support’? Use practical examples to show how a performer can maximise their stability. (4
)
Jan 2010 -
4b) What is meant by the term centre of mass and how does this help to explain why the
Fosbury
Flop is the preferred technique for high jump? (4)