The forward horizontal force made on the ground through friction dragging will make the ground exert, by reaction, a backward reaction force on the foot see figure 2. In Netball, friction is a beneficial force. Friction prevents netball players slipping, sliding and stepping, if a player does step then the other team will get the ball so this is a big component in a game. Friction is helpful to the game of basketball. It enables players to stop quickly and start running in the opposite direction.
Without friction players would slide uncontrollably around the court when they tried to stop running. The flight path and distance of the javelin depends on the angle of attack, which is the difference between the: angle of attitude: the orientation of the javelin to the ground. To be a javelin thrower, one needs a good throwing arm; to become a great javelin thrower, one needs to use the entire body.
Static friction is the friction before an object starts to slide, while Kinetic friction is the friction when the object is actually moving or sliding. The formula for both is the same, except they have different coefficient of friction values.
When a force is applied to an object, the resistive force of friction acts in the opposite direction, parallel to the surfaces. The coefficient of friction varies for each situation, and is related to the two specific surfaces that are in contact with each other. Friction plays a big role in rolling sports such as tenpin bowling and curling. In tenpin, the friction resistance on the ball makes it slow down and also enables the spin on the ball to make it roll in an arc.
The Question Biomechanics and its application sports is the science concerned with the internal and external forces acting on the human body and the effects produced by these forces. Blazevich, Netball is both a popular form of recreational activity and a prevalent sport in Australia.
It is important to consider and understand the biomechanical principles involved in performing a successful netball goal shot. This information can provide sporting personnel with a theoretical basis within which to teach the skill of netball goal shooting in order to optimise a player's technical performance. Stability and Centre of Gravity - Preparation Phase The centre of gravity refers to the point around which all the particles of the body are evenly distributed and therefore the point at which we could place a single weight vector is the body's centre of gravity Blazevich, A solid grounding or base support is crucial when performing a netball shot in order to maximise potential balance and stability.
This can translate into a more accurate skill execution. Excessive trunk movement during the skill execution can negatively impact on the stability of the athlete. This movement phase is an example of propulsion occurring particularly when the toes push against the ground to drive the body forward.
Summary of the shooting sequence:. Preparation phase. Release phase. Follow through phase. How else can we use this information? Understanding the biomechanical elements required for the optimal netball shooting technique can be applied to various sports. For example, the base of support is applied to all sports although different rules, positions and phases of play would determine the required positioning to support stability of the body.
The game of golf involves similar biomechanical principles to netball shooting, which requires the golfer to stand shoulder width apart when teeing off to create a comfortable and stable base of support. Figure 6 - As a golfer tees off, the body is stabilized and balanced through positioning the feet approximately shoulder-width apart with toes facing forward Pilates Power, Furthermore, a basketball player would adopt similar biomechanical principles when required to shoot.
For example, the player would need to establish their COM to ensure ideal stability and balance is achieved throughout the preparation phase of shooting for a goal.
In addition, they would generally incorporate a push-like movement allowing the kinetic chain to form a straight-line and enhance force. Similar bodily actions occur throughout this phase in basketball also allowing for the summation of forces to occur and in turn for the ball to reach the goal ring. Basham, N. Blazevich, A. Sports biomechanics the basics : Optimising human performance. Bloomsbury: Black Publishing. Elliott, B. The relationship of selected biomechanic and anthropometric measures to accuracy in netball shooting.
Journal of Human Movement Studies , 9 4 , Jeffery, S. Knusdon, D. Fundamentals of biomechanics : Department of Kinesiology. California Springer Publishing.
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