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Sport is not just about maximising the performance of the athlete, it is also about minimising the energy that is lost as we run, swim or slide through the fluids around us - Leaving Cert Physical Education - Question d - 2022
Question d
Sport is not just about maximising the performance of the athlete, it is also about minimising the energy that is lost as we run, swim or slide through the fluids ar... show full transcript
Worked Solution & Example Answer:Sport is not just about maximising the performance of the athlete, it is also about minimising the energy that is lost as we run, swim or slide through the fluids around us - Leaving Cert Physical Education - Question d - 2022
Step 1
Law 1 - The law of inertia
Answer
The first law states that an object at rest will remain at rest and an object in motion will remain in motion with the same speed and in the same direction unless acted upon by a net external force. In sports such as soccer, when a ball is kicked, it will keep moving until friction from the ground or another player acts on it. This concept is vital for athletes to understand as they learn to predict the motion of the ball and position themselves accordingly.
Step 2
Law 2 - The law of acceleration
Answer
According to the second law, the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass. This can be seen in track and field, where sprinters generate large amounts of force through their legs to achieve acceleration. The formula used here is:
Where:
- F is the force,
- m is the mass, and
- a is the acceleration. This law highlights the importance of training and technique in achieving optimal performance.
Step 3
Law 3 - The law of reaction
Answer
The third law states that for every action, there is an equal and opposite reaction. In swimming, when a swimmer pushes against the water with their hands and feet, the water pushes back with an equal and opposite force, propelling the swimmer forward. Understanding this principle helps swimmers refine their technique to maximize propulsion while minimizing drag.