physics
Storyboard Text
- I have to give a presentation in Physics class about the physics behind discus throw.
- Hey Vaanya why do you look so nervous?
- You will do that? Thank you!
- You can practice your presentation with me. I can tell you what you can add.
- The shape of a discus resembles the airfoil of an airplane wing, which gains greater lift as wind speed increases, according to aerodynamic engineers. As a result, you can throw a discus farther against the wind than with it.
- Aircraft gain greater lift in cold air because its slower-moving molecules are closer together than warm air, making it denser. Cold air gives any aerodynamically shaped object, such as a discus, more support to stay aloft.
- A discus spins as it leaves an athlete's hand. This gyroscopic, spinning motion stabilizes the discus in flight. The faster it spins, the greater its angular momentum and the more its gyroscopic action resists tilting or changing its spin axis. The cross-section of a discus is wing-like, so spin holds its aerodynamic shape pointed into the wind. This maintains lift and prolongs flight time.
- You can also add that a discus thrower combines the physics of aerodynamic lift and gyroscopic stability with a headwind to gain an advantage. Drawing the arms inward while spinning preserves angular momentum by increasing spin velocity. Careful timing increases acceleration just before re-extending for release. The best discus throw combines physical strength with complex physics.
- I feel much more confident about the presentation now. Thank you!
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