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Physical Education Department. SKILLS & TECHNIQUES. SKILLS & TECHNIQUES. GYMNASTICS. CENTRE OF GRAVITY & STABILITY. STANDARD GRADE. Physical Education Department. SKILLS & TECHNIQUES. SKILLS & TECHNIQUES. Balance is important in the activity of gymnastics. STANDARD GRADE. - PowerPoint PPT Presentation
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Physical Education Department
STANDARD GRADE
GYMNASTICS
CENTRE OF GRAVITY & STABILITY
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
Balance is important
in the activity of
gymnastics
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
EQUILIBRIUMAn object or person is in a state of
equilibrium when their motion is not changing
Static equilibrium is used to describe a stationary object or
person
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
EQUILIBRIUMAn object or person is in a state of
equilibrium when their motion is not changing
Dynamic equilibrium is used to describe an
object or person travelling at a constant
speed, in the same direction
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
STABILITY
STABILITY is important in many activities, it affects the control of your movements. If you are off-balance when making a hockey tackle you can stumble and fall which could make the tackle fail and hence allow the attacker through closer to his target.
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
BALANCE
This is about maintaining the equilibrium (Balanced position) of
your body.
STATIC BALANCE is a balance without movement. (for example, you may do a handstand)Here is a female gymnast doing a handstand, with a variation, on the beam
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
BALANCE
This is about maintaining the equilibrium (Balanced position) of your body.
DYNAMIC BALANCE is a balance whilst moving, for example a badminton player moving across the court, playing a shot. and moving back into the ready positionHere is a badminton player reaching out to play a low return
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
Being BALANCED depends upon your
CENTRE OF GRAVITY
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
Gravity is the force pulling an object or a person to the
ground
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
•is the point at which gravity acts upon the body.
•is the point at which your weight is evenly balanced
•is the point about which your body will rotate
THE CENTRE OF GRAVITY
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
Stability depends on:
X
•The height of the centre of gravity
The point of the Centre of Gravity
•The base of support
The Base of Support
•The line of the centre of gravity falls inside the base of support
The line of the Centre of Gravity
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
How to be MORE stable
The LOWER your centre of gravity
the MORE STABLE you will be
The Centre of Gravity is at a
different height
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
How to be MORE stable
The LARGER the area of your Base
of Support, the MORE STABLE you
will be
The Base of Support is
larger
The Base of Support is
smaller
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
How to be MORE stable
The CLOSER your centre of gravity is to the centre of
your base of support, the
MORE STABLE you are.
The Line of Gravity falls outside of the centre of the Base
of Support
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
How to be MORE stable
The HEAVIER you are, the MORE
STABLE you will be. Greater force
acting down through the line
of gravity
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
How to be MORE stable
The MORE YOU LEAN into an
oncoming force, the MORE STABLE
you will be.Direction of the
Force
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
How does the centre of gravity play a part in this balance?
The Base of Support
The Line of Gravity
The Centre of Gravity
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
Question: Which of the following gymnasts is the MOST STABLE?
Gymnast A
Gymnast B Gymnast C
Physical Education Department
STANDARD GRADE
Gymnast A is the most stable because:•They have the lowest centre of gravity
•They have the largest base of support
•And like gymnast C their centre of gravity is in the centre of the base of support
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
X
X X
Physical Education Department
STANDARD GRADE
SKILLS & TECHNIQUESSKILLS & TECHNIQUES
SummaryIn many activities balance can be very important. Gravity plays an important part in balance. Gravity is the force pulling a person or object to the ground.
The point at which gravity on the body is known as the centre of gravity. This will change depending on your height, shape or the position in which you stand.
Balance is not difficult while a person’s centre of gravity is directly above their base of support, but when it moves to one side, the force of gravity act more on that side causing the person to topple over