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Description
Flashcards by paris.oster, updated more than 1 year ago
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Created by paris.oster
over 10 years ago
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| Question | Answer |
| What does COG stand for? | Centre Of Gravity |
| What does LOG stand for? | Line Of Gravity |
| What does BOS stand for? | Base Of Support |
| Definition of Stability? | Stability is when you are stable. When the BOS and the COG is in the middle (line up). Once the LOG is outside the BOS they become unbalanced. |
| Example of stability in football. | If you are goalie you would need to have a stable BOS (base of support) |
| What is Newton's 1st law? Explain. Football example. | Inertia. Inertia is when a stationary object moves or a moving object stops.(applied force).E.g: Kicking the soccer ball. The ball won't stop unless something stops it. |
| Newton's 2nd law. Explain Football example. | Acceleration.Any change in motion is directly proportional to the applied force and is made in the line of force.E.g: Kicking the ball into the goal. |
| Newton's 3rd law. Explain. Football example. | Action/reaction. For every action there is a equal and opposite reaction.E.g: ball bouncing off a persons head. |
| What is a lever? | A lever is something solid or rigid which can be used to apply a force. |
| What is a fulcrum? | The pivot point around which the movement happens. |
| Definition of load? | The weight that needs to be moved. |
| What is force? | The place where the force is applied. In the body this is the effort produced by the muscles contracting. |
| What is a first class lever? | Are levers that can help to either increase force or generate more speed depending on the position of the fulcrum |
| Football example: When you are watching the ball go over your head. | |
| What is a 2nd class lever? | Is a lever that allows more force to be produced because of the effort, or force arm is longer than the resistance arm. |
| Football example: When we are going up for a header as we need the force to reach up. | |
| What is a third class lever? | Is a lever that generates speed rather than force. |
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Image:
3rd_class_lever (image/jpg)
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Football example: When we are bouncing the ball off our patella/femur. |
| Explain what force summation is? | Is a combination of a number of forces. |
| How can we produce maximum force and speed in sport? | An athlete needs to use as many body parts as possible. The more body parts involved, the greater the force or speed. |
| How can we use force summation in football? | Football throw in. You use your legs, hips, trunk, shoulders, arms and the wrist to get maximum force. |
| Definition of transfer of momentum. | Is the amount of motion by a moving object, and this can be transferred on to other objects.Everybody in motion has a certain velocity:The product of which is momentum. |
| Give an example of momentum in football. | When you are going to score a goal. you need the momentum to get the speed and power to get the ball past the goalie and score a goal. |
| What is timing? | Timing is the point at which force is applied to get maximum benefit from it. Applying at the right moment to get the maximum benefit from it. |
| Example of timing in football. | Kicking a penalty goal in football. you need to have good timing to hit the ball to get the perfect force to produce a perfect (most powerful) kick. |
| What is concentric force? | The force is being hit through the middle (COG) |
| Example of concentric force. | Football: The ball will not spin or rotate as the force has acted through the COG. Volleyball: Float serve. |
| What is eccentric force? | The object has been hit outside the COG so therefore it will have spin and/or rotation. |
| Example of eccentric force. | Football: Curves through the air into the corner of the goal. Volleyball: Top/ Back spin |
| What is impact? | When two bodies/objects collide. |
| What is rebound? | When an object bounces off another surface or object. |
| What does spin do? | When an object rotates about its centre. |
| How can we apply this to football? | When a player kicks the ball; Impact happens when the player comes into contact with the ball, when the ball hits the ground it rebounds and if the ball is kicked a certain way it will have spin on it. |
| An example in football. | Penalty kick:the player kicks the ball around the blocks by putting spin on the ball and it rebounds off the goalie to try save the goal.The impact happens when the goalie dives for the ball. |
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