Kneel down: 24.53m
Standing: 26.458
Run-up throws: 36.0805m
My result in Lying down wasn’t good compared to the class average. My result was 15.6 however the class average was 16.785. But my result in Run-up throw was much better than class average which was 49.8m. With run-up throw, I had an advantage with running very fast. So I could do much better. Most of students were same trends as I got. They were getting better results from lying down to run-up throw.
Task 2: One Skill from a sport - I’ve choose throwing in Baseball
Task 3: Giving a detailed explanation of how biomechanical principles are in force during that event. Minimum word count 500.
Biomechanics shows the skills that make people to do their performance. It actually helps people to do the performance. There are several techniques that people must use the biomechanical principle such as throwing a baseball. 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. In the human body, third class levers are most important for physical activities since they allow the development of speed. Third class levers have the force point which is muscle insertion between the joint, and resistance point which is a ball. In this case, Class 3 lever used in pitching. Effort means the power of pitcher and load means the mass of ball.
The pitcher makes sure that the ball he pitches is thrown at a right angle and at a right speed. In this matter, the initial velocity of the ball and the angle of occurrence affects where the ball drops. Whether it would be a strike or balls, it is the pitcher who controls the final distance of the ball. Pitching or even throwing a baseball seems useless till the pressure is on the ball and the aim goes like awful.
Therefore, Newton’s first law, inertia, is used when a pitcher throws very hard with his lower part of his body and sometimes the pitch is different because of inertia. 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.
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Daum Communication. Biomechanics. . (Accessed 19 Oct. 08)
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Si Vault. Pitcher Wind up. . (Accessed 19 Oct. 08)
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Athletic Alberta. 2008-08-18. . (Accessed 19 Oct. 08)
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Brian Mac. 24 Jan. 2008. Biomechanics . (Accessed 20 Oct. 08)
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Bradford. M, Dickens. S, Davis. D. 2007. Queensland Health and Physical Education Year 8-10. 627 Chapel Street, South Yarra 3141. Ben Dawe
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Brian Mac, 24th October 2008. Lever. (Accessed 5th November 2008)
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Yahoo Korea Blog. 11th November 2007. Kim Kwang Hyun. (Accessed 10th November 2008)
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Yahoo Korea Blog. 14th May 2007. Kim Byung Hyun. (Accessed 10th November 2008)
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By. Peter Lee
