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Biomechanic Presentation

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Introduction

Year 10 HPE Biomechanics Assignment Due date: 11 November 2008 Task 1: Complete the biomechanics analysis done during class. Write an analysis of the results from the activities Task 2: Choose one skill from sports (eg. Shooting - Basketball o throwing a javelin) Task 3: Using your knowledge of biomechanics, give a detailed explanation of how biomechanical principles are in force during that event. Minimum word count 500 words Task 4: Present your findings in a 3-5 minute presentation - BE CREATIVE Task 5: Marks will be allocated for our behaviour during other people's presentation My Analysis of the skill should cover the following areas: * Gravity/Centre of gravity * Newton's 3 laws * Force * Acceleration * Levers (How your bones and muscles act as levers) Definition of Biomechanics: * The scientific study of the physical movement and structure of living creatures. Task 1: Results of biomechanics analysis activities Measured in metres Lying down: 15.6m Sitting down: 25.3m Standing: 29.9m Run-up throws: 49.8m Kneel down: 30.9m ...read more.

Middle

The baseball is very good sports which has a variety physics. For example, the baseball bat is for hitting a ball When a pitcher throws a ball, a ball flows in different types of slow ball such as fastball, curve ball, slider, knuckle curve, change-up, sinker ball and etc. These kinds of balls are related to biomechanics which is gravity. The ball has 108 seams. These seams help pitchers to throw different kinds of slow ball. Also these seams are good for preventing air pressure. But why the ball goes down when a pitcher throws the ball to the catcher? That is because of gravity. When a fielder throws a ball in 45 degrees with 120km/h of velocity, it goes up first time and goes down after few seconds. The power of gravity makes this happening. It makes kind of parabolic motion. A lever is used a lot of time in a baseball such as pitching action and the baseball bat. ...read more.

Conclusion

Also when a pitcher throws a ball, it has a massive acceleration when the pitcher throws with a great force. For example, if the ball thrown in 150km/h (41.67m/s) and the mass of ball is 140g (0.14kg), the momentum is 41.67m/s X 0.14kg = 5.83. It called momentum (mass x velocity). Also baseball has 3rd Law of Newton which is action and reaction. When a pitcher throws a ball with fixed speed away from hand, the ball goes with the force of hand (hand push a ball) and force of ball (ball push a hand) makes interrelation. We can say it can be acceleration, however, acceleration only requires at the time of hand touches with a ball. We cannot explain after the ball thrown by a hand. In conclusion, Biomechanics is the science concerned with forces action on the body and the effects by forces. For example, a baseball has a full of physical activities. When a pitcher throws a ball, it makes a lot of physical activities such as inertia, acceleration, momentum, action and reaction, lever and etc. ...read more.

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