Physics
Storyboard Tekst
- So which sport do you want to know about?
- Well I would love to know about many sports , but i mostly want to know about javelin. Do you know about it?
- Since you know it is my favorite sport, please tell me about it
- Yes yes, I read about it a few days ago
- Oh, This is fascinating, tell me more
- Sure! We know that the javelin is a throwing event in track and field, and that throwing it successfully requires a combination of power and speed. Despite the fact that the javelin is the lightest of the throwing implements, it places a greater demand on precise movement skills. Throwing distances are calculated using three variables: throw, release angle, and velocity. For improved performance, both speed and power are required. Power requires the application of the greatest amount of force in the shortest amount of time. Momentum must be transferred from your lower body to your core and then to your upper body. The most proximal point, your shoulders, must be moved through the elbow, hand, and fingers to the most distal point, your fingers.
- Wow! But tell me there must be many factors affecting the throw right?
- Of course. Now let's come to the physics part. The two most important factors involving the physics of throwing a javelin are the center of gravity and center of pressure. The center of gravity is near the grip and does not change during throw. "Throwing through the tip," a popular term of how to throw a javelin, means throwing through the grip or center of gravity. The center of pressure is the aerodynamic force of drag and lift on the javelin. The change in 1986 made javelins much easier to throw and much easier to measure because the center of pressure was moved back behind the center of gravity of the javelin.
- This is so interesting!! I never knew there was this much physics used in a sport! I now understood why you like physics so much
- Yes , you are right. No absolute angle will guarantee the farthest distance on each throw. Wind speed and direction change the optimal angle of release significantly. Also, the strength and speed at which the thrower can produce changes the direction at which the javelin should be thrown. Before the 1986 change in javelins, some of the best throwers in the world would throw the javelin with as little as a 30-degree angle but at greater speed because they were able to hold onto the javelin longer, producing more force. Elite throwers now still use this method; however, the most common method is releasing the javelin at about a 40-degree angle, causing more lift and flight to the javelin.
- Thank you for telling me this! Bye!
- I'm glad you're interested in physics too now! Next time I'll tell you about some other sport. My stop is next. Bye!
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